Method for measuring ammonia content of sidestream smoke of cigarettes

A side-flow flue gas and cigarette technology, applied in measurement devices, instruments, scientific instruments, etc., can solve the problems of not establishing standard detection methods and less research, achieving good economic and social effects, simple methods, and avoiding interference. Effect

Inactive Publication Date: 2014-02-05
CHINA TOBACCO JIANGSU INDAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

my country's tobacco industry has also conducted a lot of research on the detection and analysis of ammonia in mainstream cigarette smoke. There are few studies on ammonia, and no corresponding standard detection method has been established

Method used

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  • Method for measuring ammonia content of sidestream smoke of cigarettes
  • Method for measuring ammonia content of sidestream smoke of cigarettes
  • Method for measuring ammonia content of sidestream smoke of cigarettes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A method for measuring ammonia content in cigarette sidestream smoke, the specific steps are as follows:

[0042] (1) Preparation of standard working solution

[0043] Dilute the ammonium ion standard stock solution with 0.01mol / L hydrochloric acid solution, dilute it in a volumetric flask, and prepare a series of standard working solutions, in which the ammonium ion concentration is 0.1μg / mL, 0.3μg / mL, 0.5μg / mL, 0.7μg / mL, 1.0μg / mL and 2.0μg / mL.

[0044] (2) Smoking of cigarettes

[0045] Take samples according to GB / T5606.1, balance the cigarette samples for 48 hours, and sort according to the average weight ± 20mg and the average draw resistance ± 50Pa. Select 2 sorted cigarettes, refer to the standard YC / T185-2004, and collect the sidestream smoke according to the conditions specified in GB / T19609, in which the glass fiber filter is used to capture the particulate matter of the sidestream smoke, Use a fishtail hood and two series-connected absorption bottles (usi...

Embodiment 2

[0073] Taking a cigarette sample as the analysis object, the intra-day precision experiment and the day-to-day precision experiment were carried out respectively. The same sample was measured under the same conditions, measured once every other day, and measured 6 times in total, and the relative standard deviation (RSD) of the 6 parallel determination results were calculated respectively. The measurement results are shown in Table 3 below. The results in the table show that the intra-day repeatability RSD of this experimental method is <2%, and the inter-day repeatability RSD is <5%, indicating that the method has good precision.

[0074] Table 3 Precision of the method

[0075] serial number

Intra-day determination results (μg / tube)

Day-time measurement results (μg / tube)

1

4350.72

4383.68

2

4387.04

4120.05

3

4252.96

4189.28

4

4322.24

4284.80

5

4321.12

4423.36

6

4488.16

...

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Abstract

The invention discloses a method for measuring the ammonia content of sidestream smoke of cigarettes. The method comprises the steps of preparation of a standard working solution, suction of the cigarettes, pretreatment of a sample, preparation of a solution to be measured, analysis with a chromatographic instrument, making of a standard working curve and calculation of a sample result. According to the method, the ammonia content of the sidestream smoke of the cigarettes is measured by adopting ion chromatography for the first time, and methods for capturing ammonia in the sidestream smoke of the cigarettes, namely specific capturing methods for a particulate matter (a filter disc) and gas-phase matters (a fishtail cover and an absorption bottle), are determined; the method is simple, quick, accurate, high in sensitivity and suitable for the measurement of ammonia content of the sidestream smoke of the cigarettes, and interference caused by impurity ions can be avoided.

Description

technical field [0001] The invention belongs to the technical field of cigarette mainstream smoke index measurement, and in particular relates to a method for measuring ammonia content in cigarette sidestream smoke. Background technique [0002] Ammonia is one of the 46 harmful components in the Hoffmann list of cigarette smoke, and it is also one of the important indicators for evaluating the harmfulness of cigarettes. Ammonia is a naturally occurring component in tobacco, known as NH in tobacco 4 + It is released in the form of free ammonia during tobacco smoking, and the content of ammonia in the smoke has a very important impact on the taste and strength of cigarettes. In 1959, Johnstone et al. detected ammonia in tobacco leaves and smoke, and in 1967, Neurath et al. verified this finding. [0003] Ammonia in cigarette smoke comes from nitrogen-containing compounds in tobacco and other auxiliary materials, including proteins, amino acids, nitrates, ammonium salts, ami...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02
Inventor 廖惠云庄亚东曹毅李朝建沈晓晨王珂清熊晓敏石怀彬张媛朱莹朱龙杰韩开冬
Owner CHINA TOBACCO JIANGSU INDAL
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