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Method for measuring residual sulfur dioxide content of tortoise jelly powder

A technology of sulfur dioxide and tortoise ointment powder is applied in the field of chemical detection, which can solve the problems of complicated operation, difficult control, complicated device fabrication, etc., and achieve the effects of simple operation, shortened analysis time, and fast and accurate method.

Inactive Publication Date: 2016-09-07
WUZHOU INST OF PROD QUALITY INSPECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The whole process device is complicated to manufacture, the operation is too cumbersome and difficult to control, and the rapid batch determination of residual sulfur dioxide in Guiling jelly powder is not used

Method used

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  • Method for measuring residual sulfur dioxide content of tortoise jelly powder
  • Method for measuring residual sulfur dioxide content of tortoise jelly powder
  • Method for measuring residual sulfur dioxide content of tortoise jelly powder

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Experimental program
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Effect test

Embodiment 1

[0027] 1. Experimental part

[0028] 1.1. Method principle

[0029] In the closed distillation tube of the Kjeldahl nitrogen analyzer, the sample is first acidified, and then heated and distilled to release sulfur dioxide. After the sulfur dioxide gas passes through the condensing device, it is absorbed by the lead acetate solution to generate lead sulfate. Add concentrated hydrochloric acid to the resulting solution to acidify, and then titrate with iodine standard solution until it turns blue and does not fade within 30 seconds. According to the amount of consumed iodine standard solution, calculate the residual amount of sulfur dioxide in the sample according to the formula.

[0030] 1.2. Main instruments and reagents

[0031] 1.2.1 Instruments

[0032] Automatic Kjeldahl nitrogen analyzer: Model 2200, Foss Company, Denmark; distillation tube; burette; iodine volumetric flask; volumetric flask.

[0033] 1.2.2 Reagents

[0034] Iodine absorption solution: 0.01mol;

[0...

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Abstract

The invention provides a method for measuring the residual sulfur dioxide content of tortoise jelly powder. The method has the advantages of short operation time and small detection error. The method comprises the following steps: (1) processing a sample; (2) distillation: adding 8 mL of hydrochloric acid into a distillation tube, immediately installing the distillation tube on a Kjeldahl apparatus, rotating the distillation tube to completely seal the distillation tube, opening the distillation switch, carrying out distillation under heating for 6 to 10 minutes, inserting the lower end of a condensing tube into an iodine flask containing 20 mL of iodine absorption liquid, closing the distillation switch to stop distillation when the volume of distillate in the iodine flask reaches 120 mL, and washing the pipe that is inserted into a lead acetate absorption liquid with a little amount of water, and carrying out a blank experiment at the same time; (3) dropwise adding 8 mL of concentrated hydrochloric acid and 1 mL of starch indicator into the iodine flask in sequence, shaking, dropwise adding an iodine standard titration solution until the solution becomes blue and blue color lasts for at least 30 seconds, and recording the volume of used iodine standard solution; (4) calculating. The invention belongs to the technical field of chemical detection.

Description

technical field [0001] The invention discloses a method for measuring the residual amount of sulfur dioxide, in particular, a method for measuring the residual amount of sulfur dioxide in Guiling jelly powder; it belongs to the technical field of chemical detection. Background technique [0002] Guiling jelly powder is a traditional health food with a long history in Wuzhou, Guangxi. It is mild in nature, neither cold nor dry, and has the functions of clearing heat and dehumidification, promoting blood and promoting muscle growth, moistening intestines and laxatives, beautifying and refreshing, and is suitable for all ages, so it is very popular among people. Loved and sold well both at home and abroad. Guiling jelly powder is made of tortoise shell, jelly (starch, jelly extract), angelica, smilax, licorice, honeysuckle and dandelion as the main raw materials. Products with different functions cater to the tastes of consumers. [0003] However, with the rapid development o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N31/16G01N1/44
CPCG01N31/16G01N1/44
Inventor 吴婕蔡宇春李镇坤李倩雯岑昕霖陈东红黄敏谭略
Owner WUZHOU INST OF PROD QUALITY INSPECTION
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