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Chromium-containing gelatin standard substance and preparation method thereof

A technology of standard substance and gelatin, which is applied in the field of gelatin standard substance and its preparation, can solve the problem of no gelatin standard substance, etc., and achieve the effects of easy promotion, improved matching degree, good uniformity and stability

Inactive Publication Date: 2014-02-05
NAT INST OF METROLOGY CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the detection of chromium content in gelatin is mainly in accordance with GB / T5009.123-2003, but there is no gelatin standard substance with traceable value

Method used

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  • Chromium-containing gelatin standard substance and preparation method thereof
  • Chromium-containing gelatin standard substance and preparation method thereof
  • Chromium-containing gelatin standard substance and preparation method thereof

Examples

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Embodiment

[0021] The invention relates to a chromium-containing gelatin standard substance, in which chromium is added into the matrix gelatin, and 10 mg of chromium is contained in each kg of the matrix gelatin.

[0022] The specific preparation method of the above-mentioned chromium-containing gelatin standard substance comprises the following steps:

[0023] (1) Material selection:

[0024] A. The base gelatin is commercially available skin gelatin or bone gelatin, and its chromium content is about 0.1 mg / kg.

[0025] B. Chromium-containing solution: mix chromium single-element standard substance solution with ultrapure water: wherein the chromium content of chromium single-element standard substance solution is 1000 μg / mL (produced by China Institute of Metrology, the standard is GBW08614); ultrapure water: Conforms to the first-class water requirements in GB / T6682-2008 analytical laboratory water specifications and test methods. The conductivity at 25°C is less than or equal to 0...

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Abstract

The invention discloses a chromium-containing gelatin standard substance and a preparation method thereof. The standard substance takes gelatin as a matrix, and chromium is added into the gelatin so that the chromium content of the standard substance is 10mg / kg. The chromium-containing gelatin standard substance and preparation method thereof disclosed by the invention have the following advantages and beneficial effects that: based on a characteristic that the gelatin is insoluble in clod water and soluble in warm water, trace of chromium is added into the gelatin matrix, so that the standard substance for detecting the chromium content of the gelatin is formed; the application of the standard substance facilitates the improvement of the matching degree of the standard substance and the sample matrix in the detection of the chromium content of the gelatin, thereby improving the accuracy and reliability of detection results. The preparation method of the standard substance is simple to operate and easy to promote, and the chromium content of the prepared gelatin standard substance is uniform.

Description

technical field [0001] The invention relates to a chromium-containing gelatin standard substance and a preparation method thereof. The gelatin standard substance is a measurement standard and is mainly used for calibrating measuring instruments and evaluating the accuracy of measurement methods. Background technique [0002] A standard substance is a material or substance that has one or more sufficiently uniform and well-defined property values ​​for calibrating instruments, evaluating measurement methods, or assigning values ​​to materials. Standard substances require uniformity, stability and quantitative accuracy. [0003] Gelatin is a product obtained by moderate degradation and denaturation of collagen. Gelatin has excellent physical and chemical properties and nutritional functions, so it is widely used in the fields of food and medicine. The current national food additive gelatin standard GB6783-1994 clearly stipulates that the chromium limit of skin gelatin is ≤1....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28
Inventor 韦超赵洋马康黄志丁王亚萍
Owner NAT INST OF METROLOGY CHINA
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