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Method for testing sulphates of tobacco by full-automatic chemical analyzer

An automatic chemistry and analyzer technology, applied in scientific instruments, analytical materials, instruments, etc., can solve the problems of increasing the probability of errors and cumbersome operation steps, and achieve the effects of reducing errors, good repeatability, and simplifying analysis steps

Inactive Publication Date: 2008-04-16
ZHENGZHOU TOBACCO RES INST OF CNTC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no international standard for the determination of sulfur or sulfate in tobacco
The problem now is that many experiments currently use total sulfur as sulfate in the determination of sulfate in tobacco
This undoubtedly increases the probability of errors and makes the operation steps cumbersome

Method used

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  • Method for testing sulphates of tobacco by full-automatic chemical analyzer
  • Method for testing sulphates of tobacco by full-automatic chemical analyzer
  • Method for testing sulphates of tobacco by full-automatic chemical analyzer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: Determination of sulfate in flue-cured cigarettes.

[0028] (1) Preparation of test solution

[0029] Accurately weigh 0.25g of tobacco sample into a 50mL Erlenmeyer flask with a stopper, add 25mL of deionized water, shake on a shaker for 40min, filter with rapid qualitative filter paper, discard the first few milliliters of filtrate, and collect the rest for later use.

[0030] (2) Standard solution configuration

[0031] Prepare standard stock solution A with baked sodium sulfate standard product: Weigh 14.7921g of sodium sulfate in a beaker, accurate to 0.0001g, dissolve with deionized water, transfer to a 1000mL volumetric flask, and dilute to the mark with deionized water . The concentration of standard stock solution A is: 9.9003mg / mL (as SO 4 2- concentration meter). (Calculation method: SO in sodium sulfate 4 2- The content is (96 / 142)×100%, the concentration of standard stock solution A is: 14.7921×(96 / 142)×99.9 (purity of sodium sulfate)×1000...

Embodiment 2

[0077] Example 2: Determination of sulfate in mixed cigarettes.

[0078] (1) Preparation of test solution

[0079] Accurately weigh 0.25g of tobacco sample into a 50mL Erlenmeyer flask with a stopper, add 25mL of deionized water, shake on a shaker for 40min, filter with rapid qualitative filter paper, discard the first few milliliters of filtrate, and collect the rest for later use.

[0080] (2) Standard solution configuration

[0081] Prepare standard stock solution A with baked sodium sulfate standard product: Weigh 14.7921g of sodium sulfate in a beaker, accurate to 0.0001g, dissolve with deionized water, transfer to a 1000mL volumetric flask, and dilute to the mark with deionized water . The concentration of standard stock solution A is: 9.9003mg / mL (as SO 4 2- concentration meter).

[0082] Standard stock solution B: Pipette 10mL of standard stock solution A into a 100mL volumetric flask, and dilute to the mark with deionized water. The concentration of standard sto...

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Abstract

A method for detecting sulphate in tobacco by using a full automatic chemical analysis instrument includes the following steps of: using de-ionized water to leach tobacco samples; assembling analysis modules of the full automatic chemical analysis instrument according to a sulphate determination piping plan; assembling cation exchange columns on the analysis modules; determining the contents of the sulphate in the tobacco with the prepared full automatic chemical analysis instrument; figuring out the contents of the sulphate in the tobacco according to a formula. The method of the invention can extract the sulphate from the tobacco rapidly, combine continuous flow analysis technique and cation exchange technique and perform synchronous separation detection on the sulphate in the tobacco, thereby achieving separation when solution flows and eliminating interference, then the sulphate reacts with a reagent to integrate the steps of separation and reaction, thereby decreasing the error caused by the separation of the steps of separation and reaction and achieving quick and accurate determination of the sulphate in the tobacco. The invention can achieve mass sample introduction, thereby further simplifying analysis steps and improving working efficiency.

Description

technical field [0001] The invention belongs to a method for detecting chemical components of tobacco, in particular a method for detecting sulfate in tobacco with a full-automatic chemical analyzer. Simultaneous separation and detection of salt, so as to quickly and accurately detect the sulfate content in tobacco. Background technique [0002] Sulfur is a relatively common element in tobacco. Appropriately increasing the sulfur content can reduce the burning duration of tobacco leaves and effectively reduce the ash alkalinity; however, if the sulfur content is too high, it will have an astringent taste and adversely affect the quality of tobacco. Therefore, the determination of sulfur content in tobacco is of great significance. [0003] Judging from the classification of tobacco, it is a plant, and it is also a special plant, and many indicators related to its quality have national standards. However, there is no international standard for the determination of sulfur or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/96
Inventor 张威王颖胡清源邢军王芳唐纲岭陈再根
Owner ZHENGZHOU TOBACCO RES INST OF CNTC
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