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Ion chromatography method for simultaneously determining sorbic acid radicals, phosphate radicals and citric acid radicals in reconstituted tobacco and application

A technology for ion chromatography and reconstituted tobacco leaves, which is applied in the directions of measuring devices, material separation, instruments, etc., can solve the problems of low sensitivity, poor repeatability, complex composition of reconstituted tobacco leaves, etc., and achieves quantitative and accurate results

Active Publication Date: 2018-11-27
CHINA TOBACCO GUANGDONG IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no report on the simultaneous determination of sorbate, phosphate and citrate in reconstituted tobacco leaves, and the composition of reconstituted tobacco leaves is complex and the ion interference is large, and simple pretreatment methods cannot remove the interfering ions
At present, the following problems exist in the determination of sorbic acid content in reconstituted tobacco leaves: compared with phosphate and citrate, the sensitivity of sorbate on the separation column is relatively low, and the adjacent nitrate (must exist in the reconstituted tobacco sample) However, the response is very high, and the interference of nitrate is relatively large, which makes the determination results inaccurate and poor in repeatability.

Method used

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  • Ion chromatography method for simultaneously determining sorbic acid radicals, phosphate radicals and citric acid radicals in reconstituted tobacco and application
  • Ion chromatography method for simultaneously determining sorbic acid radicals, phosphate radicals and citric acid radicals in reconstituted tobacco and application
  • Ion chromatography method for simultaneously determining sorbic acid radicals, phosphate radicals and citric acid radicals in reconstituted tobacco and application

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Experimental program
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Effect test

Embodiment 1

[0033] The impact experiment of embodiment 1 extractant

[0034] The three target components of sorbate, phosphate and citrate measured by the present invention can be dissolved in water, and for the determination of water-soluble ions, commonly used extractants are pure water, acid solution and alkali solution. Since the separation column used in the method is an anion column, a large amount of acid radical ions will cause interference, so I tried water and 4mmol L -1 NaOH solution was used as the extractant. The results (see Table 2) show that: under alkaline conditions, the extraction efficiency of phosphate is significantly lower. Therefore, pure water was selected as the extractant in this experiment.

[0035] The extraction efficiency comparison of different extractants in table 2

[0036]

[0037] Using pure water as the extractant, the content of the target components was determined for samples of the same weight at different extraction times (see Table 3). The ...

Embodiment 2

[0041] The research experiment of embodiment 2 sample solution purification treatment

[0042] Due to the complex composition of reconstituted tobacco leaves, the sample extract must be purified to remove components that pollute the chromatographic column before it can be analyzed by ion chromatography. Therefore, this experiment investigated the purification effect of RP column and C18 solid phase extraction column. Because the component to be measured contains organic groups and ionizable groups, under neutral and slightly acidic conditions, ionization is suppressed, and there is a certain retention on the solid phase column, which makes the recovery rate after purification low. Dilute the sample extract with 250mmol L -1The NaOH solution is adjusted to be alkaline (the use of high-concentration lye can reduce the amount used and achieve the purpose of ignoring the volume change), which can promote the ionization of the acid radical group and weaken its interaction with the ...

Embodiment 3

[0045] The determination experiment of embodiment 3 chromatographic conditions

[0046] In this experiment, the peaks of sorbate, phosphate and citrate on the three ion chromatography columns of AS20, AS18 and AS11-HC were investigated respectively. By comparison, it was found that the separation of phosphate and citrate on the three kinds of chromatographic columns, The peak shape symmetry, peak width and sensitivity are all good, but the difference of sorbic acid is relatively large. The results show that its peak elution on the AS11-HC column is the best, so this experiment chooses the AS11-HC chromatographic column.

[0047] Compared with phosphate and citrate, the sensitivity of sorbate on the AS11-HC separation column is relatively low, while the response of its adjacent nitrate is very high. In order to reduce the interference of nitrate, the test compared different concentrations The influence of eluent and column temperature on the separation of the two acid ions, the...

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Abstract

The invention provides an ion chromatography method for simultaneously determining sorbic acid radicals, phosphate radicals and citric acid radicals in a reconstituted tobacco. The invention creates amethod for determining sorbic acid radicals, phosphate radicals and citric acid radicals in the reconstituted tobacco by taking a 4mmol L-1 KOH solution as a leacheate with initial concentration andAS11-HC column as a separation column under the column temperature of 24 DEG C. According to the method, the interference of bitrate radicals on sorbic acid radicals is solved; the sorbic acid in a sample is more accurately and reliably quantified; the relative standard deviation of the tested contents of all the to-be-tested components is 0.18%-0.74%; the adding standard recovery rate is within 97.1%-102.7%; the method is accurate, simple and reliable. The ion chromatography method is accurate, simple and reliable and is suitable for the simultaneous determination of the sorbic acid radicals,phosphate radicals and citric acid radicals in the reconstituted tobacco.

Description

technical field [0001] The invention relates to the technical field of detection of reconstituted tobacco leaves, in particular to an ion chromatography method and application for simultaneously determining sorbate, phosphate and citrate in reconstituted tobacco leaves. Background technique [0002] Paper-making reconstituted tobacco has been widely used in the production process of cigarettes because of its functions of balancing tobacco structure, stabilizing cigarette quality, and effectively reducing the release of tar and some harmful components. Since reconstituted tobacco leaves use discarded tobacco stems, tobacco leaf fragments, and tobacco dust as raw materials, there is a certain gap between the raw materials and tobacco leaves, such as differences in physical properties, sensory quality, tar reduction, and functionality. Therefore, one or several additives are added to the reconstituted tobacco leaves to improve one or some of its properties, such as using sorbat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/96G01N30/64G01N30/06G01N30/14
CPCG01N30/06G01N30/14G01N30/64G01N30/96G01N2030/062G01N2030/146G01N2030/645G01N2030/965
Inventor 王予赖燕华汪军霞潘晓薇高仁吉
Owner CHINA TOBACCO GUANGDONG IND
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