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Leather standard sample for European union REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) laws high concern substance X-fluorescence spectroscopy quantitative screening and preparation method thereof

A fluorescence spectrometry and standard sample technology, applied in the field of leather standard samples and preparation for quantitative screening of substances of high concern X fluorescence spectrometry, to achieve the effect of solving compatibility problems, ensuring accuracy and strong designability

Active Publication Date: 2018-09-28
蒋小良
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, there is no report on leather standard samples and preparation methods for quantitative screening of substances of very high concern by X-ray fluorescence spectrometry in EU REACH regulations

Method used

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  • Leather standard sample for European union REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) laws high concern substance X-fluorescence spectroscopy quantitative screening and preparation method thereof
  • Leather standard sample for European union REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) laws high concern substance X-fluorescence spectroscopy quantitative screening and preparation method thereof
  • Leather standard sample for European union REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) laws high concern substance X-fluorescence spectroscopy quantitative screening and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: prepare standard sample

[0027] Leather standard samples suitable for the quantitative detection of substances of very high concern in EU REACH regulations by X-ray fluorescence spectrometry, and the content of the target heavy metal in the leather standard samples is 50mg / kg. In parts by weight, the preparation formula of the leather standard sample is as follows: 850g leather substrate, 40g stabilizer, 50g water, 8.0g diffusing agent and appropriate amount of heavy metal compound. The leather substrate is treated bovine leather. Described stabilizer is hydroxypropyl methylcellulose. The diffusing agent is sodium lauryl sulfate. The heavy metal compound includes lead compounds, cadmium compounds, mercury element compounds and chromium compounds; wherein, the lead compound is lead carbonate; the cadmium compound is cadmium carbonate; the mercury element compound is Mercury oxide; the chromium compound is chromium nitrate.

[0028] Described leather st...

Embodiment 2

[0035] Embodiment 2: prepare standard sample

[0036] Different from Example 1,

[0037] Leather standard samples suitable for the quantitative detection of substances of very high concern in EU REACH regulations by X-ray fluorescence spectrometry, and the content of the target heavy metal in the leather standard samples is 100mg / kg. In parts by weight, the preparation formula of the leather standard sample is as follows: 870g leather substrate, 50g stabilizer, 30g water, 12g diffusing agent and appropriate amount of heavy metal compound. The leather matrix is ​​processed pig leather; the stabilizer is hydroxyethyl cellulose; the diffusing agent is polyacrylamide; the heavy metal compounds include lead compounds, cadmium compounds, mercury element compounds and chromium class of compounds. Wherein, the lead compound is lead oxide; the cadmium compound is cadmium powder; the mercury element compound is mercury sulfide; and the chromium compound is potassium dichromate.

Embodiment 3

[0038] Embodiment 3: prepare standard sample

[0039] The difference from Example 1 is that the leather standard sample suitable for the quantitative detection of substances of very high concern in EU REACH regulation by X-ray fluorescence spectrometry, the content of the target heavy metal in the leather standard sample is 250mg / kg. In parts by weight, the preparation formula of the leather standard sample is as follows: 900g leather substrate, 30g stabilizer, 40g water, 16g diffusing agent and appropriate amount of heavy metal compound. The leather substrate is treated sheep leather. The stabilizer is polyacrylic acid. The diffusing agent is triethylhexyl phosphoric acid. The heavy metal compounds include lead compounds, cadmium compounds, mercury element compounds and chromium compounds. Wherein, the lead compound is lead nitrate; the cadmium compound is cadmium carbonate; the mercury element compound is mercury chloride; and the chromium compound is potassium dichromate...

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Abstract

The invention provides a leather standard sample for European union REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) laws high concern substance X-fluorescence spectroscopyquantitative screening and a preparation method thereof. The preparation formula of the leather standard sample is prepared from the following ingredients in parts by weight: 85 to 92 parts of leather substrates, 3 to 5 parts of stabilizing agents, 3 to 5 parts of water, 0.8 to 2.0 parts of diffusion agents and a proper amount of heavy metal compounds, wherein the content of heavy metal in the leather standard sample is 50 to 500mg / kg; the heavy metal compounds include lead compounds, cadmium compounds, mercury compounds and chromium compounds. The standard sample prepared by the method has the advantages of high uniformity and good stability; the combination condition of the heavy metal compounds and the leather substrates is consistent with a really detected leather sample; the detecting result accuracy is ensured.

Description

technical field [0001] The invention belongs to the field of chemical analysis, and relates to a standard sample and a preparation method for detecting heavy metal elements in leather, in particular to a leather standard sample and a preparation method for quantitative screening of substances of high concern in the European Union REACH regulation by X-fluorescence spectroscopy. Background technique [0002] The EU REACH regulation (Registration, Evaluation, Authorization and Restriction of Chemicals) was officially implemented by the European Union on June 1, 2007, and it is a regulation for the preventive management of all chemicals entering its market. The European Chemicals Agency (ECHA) first identified 15 substances of very high concern (SVHC) on October 28, 2008, namely mutagenic, carcinogenic, reproductive toxic substances, persistent bioaccumulation toxic substances or high persistent bioaccumulation substance. As of February 2017, there are 173 SVHCs on the list of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/2202G01N23/223
CPCG01N23/2202G01N23/223
Inventor 蒋小良陈梅曾铭邓小文王斌钟月香苏淑坛
Owner 蒋小良
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