U.S. patent application number 10/885027 was filed with the patent office on 2005-01-06 for cigarette and cigarette filter.
Invention is credited to Hasegawa, Takashi, Katayama, Kazuhiko, Tarora, Masafumi.
Application Number | 20050000526 10/885027 |
Document ID | / |
Family ID | 26625449 |
Filed Date | 2005-01-06 |
United States Patent
Application |
20050000526 |
Kind Code |
A1 |
Tarora, Masafumi ; et
al. |
January 6, 2005 |
Cigarette and cigarette filter
Abstract
A basic amino acid or a basic amino acid salt is added to a
cigarette or a cigarette filter. It is desirable for the basic
amino acid or the basic amino acid salt to be added in an amount of
at least 1 mg/cigarette. It is also desirable for the basic amino
acid or the basic amino acid salt to be added to the cigarette or
the cigarette filter in the form of an aqueous solution. Also, it
is possible to add a surfactant to the cigarette or the cigarette
filter together with the basic amino acid or the basic amino acid
salt.
Inventors: |
Tarora, Masafumi;
(Yokohama-shi, JP) ; Katayama, Kazuhiko;
(Yokohama-shi, JP) ; Hasegawa, Takashi;
(Yakohama-shi, JP) |
Correspondence
Address: |
BIRCH STEWART KOLASCH & BIRCH
PO BOX 747
FALLS CHURCH
VA
22040-0747
US
|
Family ID: |
26625449 |
Appl. No.: |
10/885027 |
Filed: |
July 7, 2004 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
10885027 |
Jul 7, 2004 |
|
|
|
PCT/JP03/00040 |
Jan 7, 2003 |
|
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Current U.S.
Class: |
131/200 ;
131/331; 131/360 |
Current CPC
Class: |
A24B 15/30 20130101;
A24D 3/14 20130101 |
Class at
Publication: |
131/200 ;
131/360; 131/331 |
International
Class: |
A24F 001/00 |
Foreign Application Data
Date |
Code |
Application Number |
Jan 8, 2002 |
JP |
2002-001508 |
Apr 30, 2002 |
JP |
2002-128953 |
Claims
What is claimed is:
1. A cigarette containing a basic amino acid or a basic amino acid
salt.
2. A cigarette according to claim 1, wherein the basic amino acid
or the basic amino acid salt is contained in an amount of at least
1 mg/cigarette.
3. A cigarette according to claim 1, wherein the basic amino acid
or the basic amino acid salt is added in the form of an aqueous
solution.
4. A cigarette according to claim 1, wherein the basic amino acid
or the basic amino acid salt is selected from the group consisting
of arginine, arginine salt, lysine, lysine salt, histidine,
histidine salt, ornithine, ornithine salt, citrulline, citrulline
salt, hydroxyzine and hydroxyzine salt.
5. A cigarette according to claim 1, further containing a
surfactant.
6. A cigarette filter containing a basic amino acid or a basic
amino acid salt.
7. A cigarette filter according to claim 6, wherein the basic amino
acid or the basic amino acid salt is contained in an amount of at
least 1 mg/cigarette.
8. A cigarette filter according to claim 6, wherein the basic amino
acid or the basic amino acid salt is added in the form of an
aqueous solution.
9. A cigarette filter according to claim 6, wherein the basic amino
acid or the basic amino acid salt is selected from the group
consisting of arginine, arginine salt, lysine, lysine salt,
histidine, histidine salt, ornithine, ornithine salt, citrulline,
citrulline salt, hydroxyzine and hydroxyzine salt.
10. A cigarette filter according to claim 6, further containing a
surfactant.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This is a Continuation Application of PCT Application No.
PCT/JP03/00040, filed Jan. 7, 2003, which was not published under
PCT Article 21(2) in English.
[0002] This application is based upon and claims the benefit of
priority from prior Japanese Patent Applications No. 2002-001508,
filed Jan. 8, 2002; and No. 2002-128953, filed Apr. 30, 2002, , the
entire contents of both of which are incorporated herein by
reference.
BACKGROUND OF THE INVENTION
[0003] 1. Field of the Invention
[0004] The present invention relates to a cigarette low in the
amounts of aldehydes contained in the mainstream smoke and to a
cigarette filter that permits lowering the amounts of aldehydes
contained in the mainstream smoke of a cigarette.
[0005] 2. Description of the Related Art
[0006] Various chemical components are contained in the mainstream
smoke inhaled by the smoker in smoking a cigarette. Among these
chemical components, it was difficult to remove by adsorption the
aldehydes represented by formaldehyde by the ordinary cigarette
filter. Therefore, it is desirable to remove the aldehydes from the
mainstream smoke of the cigarette.
[0007] It was attempted in the past to use various additives in the
cigarette filter in order to remove by adsorption the aldehydes
contained in the mainstream smoke of the cigarette. However, the
use of the additives available in the past gives rise to problems.
For example, the taste of the cigarette is impaired.
[0008] An object of the present invention is to provide a cigarette
and a cigarette filter, which permit effectively lowering the
aldehyde content in the mainstream smoke of a cigarette and which
also permit suppressing the detrimental effects such as degradation
of the cigarette taste.
BRIEF SUMMARY OF THE INVENTION
[0009] According to a first aspect of the present invention, there
is provided a cigarette containing a basic amino acid or a basic
amino acid salt.
[0010] According to a second aspect of the present invention, there
is provided a cigarette filter containing a basic amino acid or a
basic amino acid salt.
[0011] In the present invention, it is desirable for a basic amino
acid or a basic amino acid salt to be contained in an amount of at
least 1 mg/cigarette. In the present invention, it is desirable for
the basic amino acid or the basic amino acid salt to be contained
in the cigarette or the cigarette filter in the form of an aqueous
solution. It is also desirable for the cigarette or the cigarette
filter of the present invention to further contain a
surfactant.
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING
[0012] FIG. 1 schematically shows the construction of an apparatus
for measuring formaldehyde contained in the mainstream smoke of a
cigarette, which was used in the Examples of the present
invention;
[0013] FIG. 2 is a cross-sectional view showing the construction of
a cigarette used in the Examples of the present invention; and
[0014] FIG. 3 is a cross-sectional view showing the construction of
a cigarette filter used in another Example of the present
invention.
DETAILED DESCRIPTION OF THE INVENTION
[0015] As a result of extensive research conducted from various
viewpoints in an attempt to lower the aldehyde content in the
mainstream smoke of a cigarette, the present inventors have found
that a basic amino acid or a basic amino acid salt is effective in
lowering the aldehyde content in the mainstream smoke of the
cigarette. The basic amino acid or the basic amino acid salt
includes, for example, arginine, arginine salt, lysine, lysine
salt, histidine, histidine salt, ornithine, ornithine salt,
citrulline, citrulline salt, hydroxyzine and hydroxyzine salt.
Particularly, arginine and a salt thereof are admitted as food
additives.
[0016] In the present invention, that portion of the cigarette to
which the basic amino acid or the basic amino acid salt is added is
not particularly limited. For example, the basic amino acid or the
basic amino acid salt can be added to any of the cut tobacco, the
cigarette wrapper and the filter.
[0017] It is possible for the cigarette filter of the present
invention to be a filter attached to the inhaling side of the
tobacco portion of the cigarette or to be a filter in the form of a
cigarette holder.
[0018] In the cigarette or the cigarette filter of the present
invention, the basic amino acid or the basic amino acid salt is
contained in an amount of at least 1 mg/cigarette. If the amount of
the basic amino acid or the basic amino acid salt is smaller than
the amount noted above, it is difficult to obtain a sufficient
effect of lowering the aldehyde content in the mainstream smoke of
the cigarette.
[0019] If the basic amino acid or the basic amino acid salt is used
in the presence of water, the effect of lowering the aldehyde
content in the mainstream smoke of the cigarette can be increased
in the present invention.
[0020] The effect of lowering the aldehyde content in the
mainstream smoke of the cigarette can also be increased in the case
where the basic amino acid or the basic amino acid salt is used
together with a surfactant. It is considered reasonable to
understand that an aqueous solution containing a surfactant and a
basic amino acid or a basic amino acid salt exhibits an improved
wettability so as to permit the basic amino acid or the basic amino
acid salt to be dispersed sufficiently, with the result that the
aldehyde content in the mainstream smoke of the cigarette is
lowered. The surfactant used in the present invention includes
ionic surfactants such as potassium sorbate, sodium oleate and
sodium laurate, and nonionic surfactants such as sucrose laurate,
sucrose myristate, sucrose palmitate, and sucrose stearate, though
the surfactant used in the present invention is not limited to
those exemplified above.
EXAMPLES
[0021] In the method of measuring the aldehydes contained in the
mainstream smoke of a cigarette, which was used in the following
Examples, the derivative of 2,4-dinitrophenyl hydrazine (DNPH), a
trapping substance, was measured by high-speed liquid
chromatography (HPLC). The substances that can be measured
simultaneously by this method are eight components including
formaldehyde, acetaldehyde, acetone, acrolein, propionaldehyde,
crotonaldehyde, methyl ethyl ketone and n-butylaldehyde. In the
following Examples, the description is directed to formaldehyde
among the aldehydes (carbonyl compounds) that were to be
measured.
[0022] In the first step, a trapping solution was prepared by
dissolving 9.51 g of 2,4-dinitrophenyl hydrazine (DNPH) in 1 L of
acetonitrile, followed by adding 5.6 mL of 60% perchloric acid and
subsequently diluting the resultant solution with ultra pure water
to 2 L.
[0023] The construction of the measuring apparatus will now be
described with reference to FIG. 1. As shown in FIG. 1, a DNPH
trapping solution 12 is put in a Drechsel type trap 11. The
Drechsel type trap 11 had an inner volume of 250 mL, the amount of
the DNPH trapping solution was 100 mL, and the dead volume was 150
mL. The Drechsel type trap 11 was put in an ice water bath 13 so as
to cool the trap 11. The lower end of a glass pipe 14 having a
cigarette 1 mounted in the tip is dipped in the trapping solution
12 housed in the Drechsel type trap 11. Further, a glass pipe 15
having a Cambridge pad 16 mounted thereto is mounted to communicate
with the dead volume of the Drechsel type trap 11, and a smoking
machine 17 was connected to the Cambridge pad 16.
[0024] The cigarette 1 was attached to the glass pipe 14 so as to
permit the cigarette 1 to be automatically smoked under the
standard smoking conditions specified in ISO standards. To be more
specific, the operation of sucking 35 mL of the smoke in a single
puff for two seconds for a single cigarette was repeated at an
interval of 58 seconds. While the mainstream smoke was being
bubbled, formaldehyde was converted into a derivative of DNPH. Two
cigarettes were used for the measurement.
[0025] The formaldehyde derivative thus formed was measured by
HPLC. In the first step, the trapping solution was filtered,
followed by diluting the filtered trapping solution with a Trizma
Base solution (4 mL of trapping solution: 6 mL of Trizma Base
solution). Then, the diluted solution was measured by HPLC. The
measuring conditions of the HPLC were as follows:
[0026] Column: HP LiChrospher 100 RP-18 (5.mu.) 250.times.4 mm
[0027] Guard column: HP LiChrospher 100 RP-18 (5.mu.) 4.times.4
mm
[0028] Column temperature: 30.degree. C.
[0029] Detection wavelength: DAD 356 nm
[0030] Injection amount: 20 .mu.L
[0031] Mobile phase: Gradients by three phases (solution A: ultra
pure aqueous solution containing 30% of acetonitrile, 10% of
tetrahydrofuran and 1% of IPA; solution B: ultra pure aqueous
solution containing 65% of acetonitrile, 1% of tetrahydrofuran and
1% of IPA; solution C: 100% of acetonitrile).
[0032] The construction of the cigarette used as a sample will now
be described with reference to the cross-sectional view shown in
FIG. 2. As shown in FIG. 2, the cigarette having comprised a
cigarette section 20 in which cut tobacco 21 was wrapped with a
cigarette wrapper 22, and a filter section 30 in which a filter 31
was wrapped with a forming paper 32. The filter section 30 was
mounted on the cigarette section 20 by using a tipping paper 40. It
is possible to use, for example, cellulose acetate tow as the
material of the filter.
[0033] Incidentally, it is possible to use a plurality of divided
plugs of the filter. In this case, the individual filter plugs are
wrapped with an individual plug wrap paper, followed by wrapping
integrally the filter plugs with a forming paper so as to obtain
the filter section 30.
[0034] In testing a cigarette prepared by using a filter for the
testing having a basic amino acid or a basic amino acid salt added
thereto, a tobacco section was taken out by cutting the acetate
filter from a cigarette available on the market, which contained 6
mg of tar, and a sample was prepared by connecting the tobacco
section to the filter for the testing. An atomizer was used for
adding a basic amino acid or a basic amino acid salt to the filter
for the testing. Also, where a basic amino acid or a basic amino
acid salt was added to the cut tobacco, the cut tobacco was once
taken out of a cigarette available on the market. Then, a basic
amino acid or a basic amino acid salt was added to the cut tobacco
by using a sprayer, followed by wrapping again the cut tobacco with
a cigarette wrapper so as to obtain a tobacco section sample.
[0035] Incidentally, in respect of a tobacco section prepared by
cutting away the filter section of a cigarette available on the
market, which contained 6 mg of tar, the formaldehyde content in
the mainstream smoke of the cigarette was measured by the measuring
method described above with the number of puffs set at 7. The
formaldehyde content was found to be 110 .mu.g.
Example 1
[0036] An acetate filter without a plasticizer was prepared as base
filter A. Also, a filter for the testing was prepared by adding 35
mg of an aqueous solution containing 10% by weight of arginine to
base filter A by using an atomizer, followed by drying the base
filter A for 48 hours, the prepared filter containing 3.5 mg of
arginine. Likewise, another filter for the testing was prepared by
adding 35 mg of an aqueous solution containing 10% by weight of
arginine glutamate to base filter A by using an atomizer, followed
by drying base filter A for 48 hours, the prepared filter
containing 3.5 mg of arginine glutamate.
[0037] Each of the filters thus prepared was connected to the
tobacco section noted above, and the formaldehyde content (FA) in
the mainstream smoke of the cigarette was measured by the measuring
method described above. Table 1 shows the results. As apparent from
Table 1, the cigarette using the filter prepared by adding arginine
or arginine glutamate to base filter A exhibits a sufficient effect
of lowering the formaldehyde content in the mainstream smoke of the
cigarette, compared with the cigarette using base filter A.
1 TABLE 1 FA filtering [.mu.g] rate [%] base filter A 36.5 66.8
addition of 3.5 mg of 21.9 80.3 arginine addition of 3.5 mg of 28.3
74.3 arginine glutamate
Example 2
[0038] Base filter B was prepared by adding 6% by weight of
triacetin as a plasticizer to base filter A. Base filter B is equal
to the filter used in the cigarette product. Also, a filter for the
testing was prepared by adding 35 mg of an aqueous solution
containing 10% by weight of arginine to base filter B, followed by
drying base filter B for 48 hours, the prepared filter containing
3.5 mg of arginine. Likewise, another filter for the testing was
prepared by adding 35 mg of an aqueous solution containing 10% by
weight of arginine glutamate to base filter B, followed by drying
base filter B for 48 hours, the prepared filter containing 3.5 mg
of arginine glutamate.
[0039] Each of the filters thus prepared was connected to the
tobacco section noted above, and the formaldehyde content (FA) in
the mainstream smoke of the cigarette was measured by the measuring
method described above. Table 2 shows the results. As apparent from
Table 2, the cigarette using the filter prepared by adding arginine
or arginine glutamate to base filter B having a plasticizer added
thereto also exhibits a sufficient effect of lowering the
formaldehyde content in the mainstream smoke of the cigarette.
2 TABLE 2 FA filtering [.mu.g] rate [%] base filter B 44.0 60.0
addition of 3.5 mg of 21.1 80.8 arginine addition of 3.5 mg of 34.1
69.0 arginine glutamate
Example 3
[0040] Three kinds of filter containing 3.5 mg of arginine, 7.0 mg
of arginine and 10.5 mg of arginine, respectively, were prepared by
adding 35 mg of an aqueous solution containing 10% by weight of
arginine, 35 mg of an aqueous solution containing 20% by weight of
arginine, and 35 mg of an aqueous solution containing 30% by weight
of arginine, respectively, to base filters B, followed by drying
base filters B for 48 hours.
[0041] Each of the filters thus prepared was connected to the
tobacco section noted above, and the formaldehyde content (FA) in
the mainstream smoke of the cigarette was measured by the measuring
method described above. Table 3 shows the results. As apparent from
Table 3, the effect of lowering the formaldehyde content in the
mainstream smoke of the cigarette is improved with increase in the
amount of arginine added to the base filter B, though a sufficient
effect can be obtained if 3.5 mg of arginine is added to base
filter B.
3 TABLE 3 FA filtering [.mu.g] rate [%] base filter B 44.0 60.0
addition of 3.5 mg 21.1 80.8 of arginine addition of 7.0 mg 25.0
77.3 of arginine addition of 10.5 mg 20.2 81.6 of arginine
Example 4
[0042] The following measurement was performed in order to evaluate
the effect of lowering the formaldehyde content in the mainstream
smoke of the cigarette that is produced by arginine or arginine
glutamate in the presence of water.
[0043] Specifically, 35 mg of an aqueous solution containing 10% by
weight of arginine or 35 mg of an aqueous solution containing 10%
by weight of arginine glutamate was added to base filter A or base
filter B as in Example 1 or Example 2, followed by measuring the
formaldehyde content (FA) in the mainstream smoke of the cigarette
immediately after the addition of the aqueous solution as in
Example 1 or Example 2. In each case, the addition amount of
arginine or arginine glutamate was 3.5 mg. Table 4 shows the
result. As apparent from comparison between Table 4 and Table 1 or
Table 2, the effect of lowering the formaldehyde content in the
mainstream smoke of the cigarette is increased in the case where
arginine or arginine glutamate is present together with water.
4 TABLE 4 FA filtering [.mu.g] rate [%] base filter A 36.5 66.8
addition of 35 mg of 14.3 87.0 arginine aqueous solution addition
of 35 mg of 14.9 86.5 arginine glutamate aqueous solution base
filter B 44.0 60.0 addition of 35 mg of 11.6 89.5 arginine aqueous
solution addition of 35 mg of 17.8 83.8 arginine glutamate aqueous
solution
Example 5
[0044] An aqueous solution containing 20% by weight of arginine was
added in an amount of 20% by weight by spraying to cut tobacco put
in a mixing drum by using a hand sprayer, followed by drying the
cut tobacco at 80.degree. C. for 5 minutes in a dryer. Then, the
cut tobacco was conditioned for 48 hours so as to prepare a tobacco
section consisting of 690 mg of the cut tobacco and having a length
of 59 mm. Cigarette wrapper 4P35 manufactured by Mishima Seishi
K.K. was used as the cigarette wrapper. The arginine addition
amount was 4% by weight (27.6 mg) based on the amount of cut
tobacco. Under this condition, the amount of formaldehyde contained
in the mainstream smoke of the cigarette was measured at the outlet
of the tobacco section as above without attaching a filter to the
tobacco section. On the other hand, the base cut tobacco used for
comparison was prepared by adding 20% by weight of water alone to
the cut tobacco by spraying. The amount of formaldehyde contained
in the mainstream smoke of the cigarette was also measured as above
at the outlet of the tobacco section using the base cut tobacco
noted above. Table 5 shows the result. As apparent from Table 5,
the formaldehyde content in the mainstream smoke of the cigarette
can also be lowered markedly by adding arginine to the cut
tobacco.
5 TABLE 5 FA at outlet of tobacco section reduction [.mu.g] rate
[%] Base cut tobacco 121.3 -10.3 addition of 27.6 mg 23.9 78.3 of
arginine
Example 6
[0045] A measurement similar to that for Example 4 was performed in
order to evaluate the effect of lowering the formaldehyde content
produced by various basic amino acids or basic amino acid salts in
the presence of water.
[0046] Specifically, a prescribed amount of an aqueous solution
containing each of the various basic amino acids or various basic
amino acid salts shown in Table 6 was added to base filter B,
followed by measuring, as above, the formaldehyde content (FA) in
the mainstream smoke of the cigarette immediately after addition of
the aqueous solution. In each of these cases, the addition amount
of the basic amino acid or the basic amino acid salt was 3.5 mg.
Table 6 shows the result. As apparent from Table 6, the basic amino
acid or the basic amino acid salt other than arginine also produces
the effect of lowering the formaldehyde content in the mainstream
smoke of the cigarette.
6 TABLE 6 FA filtering [.mu.g] rate [%] base filter B 44.0 60.0
addition of 35 mg of 11.6 89.5 aqueous solution containing 10 wt %
of arginine addition of 35 mg of 13.1 88.1 aqueous solution
containing 10 wt % of lysine addition of 35 mg of 18.1 83.6 aqueous
solution containing 10 wt % of lysine hydrochloride addition of 70
mg of 12.7 88.5 aqueous solution containing 5 wt % of histidine
addition of 35 mg of 17.7 83.9 aqueous solution containing 10 wt %
of citrulline addition of 35 mg of 15.7 85.7 aqueous solution
containing 10 wt % of ornithine
Example 7
[0047] A measurement similar to that for Example 2 was performed in
order to evaluate the effect of lowering the formaldehyde content
produced by various basic amino acids or basic amino acid salts in
the presence of a surfactant.
[0048] Specifically, a prescribed amount of an aqueous solution
containing arginine alone or an aqueous solution containing both
arginine and each of various surfactants was added to base filter
B, as shown in Table 7, followed by conditioning for 48 hours and
subsequently measuring the formaldehyde content (FA) in the
mainstream smoke and the increase in water content (.DELTA.W). The
surfactants used included ionic surfactants of potassium sorbate,
sodium oleate and sodium laurate and nonionic surfactants of
sucrose laurate, sucrose myristate, sucrose palmitate, and sucrose
stearate. Table 7 shows the result. As apparent from Table 7, the
effect of lowering the formaldehyde content in the mainstream smoke
of the cigarette can be obtained in the case of using a basic amino
acid or a basic amino acid salt together with a surfactant even if
water is not present together with the basic amino acid or the
basic amino acid salt. It is considered reasonable to understand
that, in the case of using an aqueous solution containing both
arginine and a surfactant, the wettability of the aqueous solution
with the filter is improved so as to improve the dispersion
capability of arginine.
7 TABLE 7 FA filtering .DELTA.W [.mu.g] rate [%] [mg] base filter B
44.0 60.0 0 addition of 35 mg of 23.2 78.9 2.06 aqueous solution
containing 10 wt % of arginine addition of 35 mg of 17.9 83.7 3.35
aqueous solution containing 10 wt % of arginine and 20 wt % of
potassium sorbate addition of 35 mg of 18.9 82.9 1.49 aqueous
solution containing 10 wt % of arginine and 2 wt % of sodium oleate
addition of 35 mg of 18.0 83.6 1.71 aqueous solution containing 10
wt % of arginine and 2 wt % of sodium laurate addition of 35 mg of
20.3 81.6 -- aqueous solution containing 10 wt % of arginine and 1
wt % of sucrose laurate addition of 35 mg of 20.9 81.0 -- aqueous
solution containing 10 wt % of arginine and 1 wt % of sucrose
myristate addition of 35 mg of 21.4 80.6 -- aqueous solution
containing 10 wt % of arginine and 0.5 wt % of sucrose palmitate
addition of 35 mg of 22.5 79.6 -- aqueous solution containing 10 wt
% of arginine and 0.5 wt % of sucrose stearate addition of 35 mg of
20.9 81.0 -- aqueous solution containing 10 wt % of arginine and 1
wt % of glycerin fatty acid ester
[0049] Sucrose laurate: available from Mitsubishi-Kagaku Foods
Corporation under the trade name of L-1695;
[0050] Sucrose myristate: available from Mitsubishi-Kagaku Foods
Corporation under the trade name of M-1695;
[0051] Sucrose palmitate: available from Mitsubishi-Kagaku Foods
Corporation under the trade name of P-1670;
[0052] Sucrose stearate: available from Mitsubishi-Kagaku Foods
Corporation under the trade name of S-1670;
[0053] Glycerin fatty acid ester (decaglycerin monolaurate):
available from Riken Vitamin under the trade name of Poem
J-0021.
[0054] The cigarette filter of the present invention can also be
used in the form of a cigarette holder constructed as shown in FIG.
3. As shown in the drawing, the cigarette filter comprises a
cylindrical cigarette holder body 41 and a filter 31 arranged
within the cigarette holder body 41. A basic amino acid or a basic
amino acid salt is contained in the filter 31. The cigarette holder
body 41 is formed integral with a mouthpiece section 42. The
aldehyde content in the mainstream smoke of the cigarette can also
be lowered in the case of using the cigarette filter of the
particular construction.
[0055] As described above in detail, using the cigarette and the
cigarette filter of the present invention can effectively lower the
content of aldehydes in the mainstream smoke of a cigarette.
* * * * *