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Method for measuring antimony in powder cosmetic by microwave digestion and hydrofluoric acid-resistant sampling system ICP-MS (inductively coupled plasma-mass spectrometry)

An ICP-MS and microwave digestion technology, which is used in the preparation of test samples, measurement devices, and material analysis by electromagnetic means. Spectrum line simple effect

Inactive Publication Date: 2012-06-20
THE INSPECTION & QUARANTINE TECH CENT ZHEJIANG ENTRY EXIT INSPECTION & QUARANTINE BUREAU
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Problems solved by technology

At present, there is no literature report on the determination of antimony content in cosmetics by microwave digestion-hydrofluoric acid-resistant sampling system ICP-MS detection technology

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  • Method for measuring antimony in powder cosmetic by microwave digestion and hydrofluoric acid-resistant sampling system ICP-MS (inductively coupled plasma-mass spectrometry)
  • Method for measuring antimony in powder cosmetic by microwave digestion and hydrofluoric acid-resistant sampling system ICP-MS (inductively coupled plasma-mass spectrometry)
  • Method for measuring antimony in powder cosmetic by microwave digestion and hydrofluoric acid-resistant sampling system ICP-MS (inductively coupled plasma-mass spectrometry)

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Embodiment Construction

[0046] 1. Instruments and instrument conditions

[0047] 1.1 Instrument used: Inductively Coupled Plasma Mass Spectrometer (ICP-MS), model: Bruker 820 MS;

[0048] 1.2 HF-resistant atomizer, spray chamber, central tube made of platinum torch, platinum sampling cone (diameter 1.1mm), platinum skimmer cone (diameter 0.5mm);

[0049] 1.3 Instrument working conditions, see Table 1

[0050] Table 1. Reference Operating Conditions for Instruments

[0051] project Working parameters plasma flow 18 L / min Auxiliary gas flow 1.8 L / min Cooling gas flow 0.14 L / min Atomizing gas flow 0.90 L / min sampling depth 7.0 mm Plasma RF power 1.40kw Injection stabilization time 35 s pump speed 4 rpm scan mode Peak-jumping scan mode scan times Single order 30 times repeat times 5 dwell time 10ms Isotopes of analyte elements and internal standard elements 121 Sb, 103 Rh Hydrofluoric acid resist...

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Abstract

The invention relates to a method for detecting the content of antimony in a cosmetic, in particular to a method for measuring the antimony in the powder cosmetic by a microwave digestion and hydrofluoric acid-resistant sampling system ICP-MS (inductively coupled plasma-mass spectrometry). The method comprises the following steps that: after a cosmetic sample is dispelled by nitric acid, hydrogen peroxide and hydrofluoric acid microwaves, organisms are discomposed; sample solution is introduced into an ICP-MS atomizer; high-temperature high-frequency plasmas are loaded by argon to carry out ionization and generate ions; after being focused, the ions enter the spectrometry; characteristic ion abundances of an antimony element and an on-line internal standard rhodium element in the sample solution are detected, wherein the characteristic ion abundance of the antimony element is directly proportional to the content of the antimony element; according to a ratio of an actually measured rhodium internal standard response value to an expected internal standard response value, correcting the response value of the antimony element; carrying out quantitative measurement by adopting an internal standard calibration curve method; calculating the content of the antimony element in the cosmetic; and obtaining the content of the antimony by a conversion factor. The method disclosed by the invention has the characteristics of strong specificity, high sensitivity and accurate result.

Description

technical field [0001] The invention relates to a method for detecting antimony content in cosmetics, in particular to a method for detecting antimony content in powder cosmetics using microwave digestion-hydrofluoric acid-resistant sampling system inductively coupled plasma mass spectrometry (ICP-MS) detection technology test methods. Background technique [0002] With the upgrading of consumption level, my country's cosmetics industry has maintained an average annual growth rate of more than 15%, and has become the second largest cosmetics production and sales country in Asia and the seventh in the world. The safety of cosmetics has also attracted more and more global attention. In recent years, with the emergence of newly synthesized and newly discovered chemical substances, the growth rate of prohibited and restricted substances is very fast; however, the growth of accurate quantitative detection methods cannot adapt to the growth rate of prohibited and restricted substa...

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Application Information

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IPC IPC(8): G01N27/64G01N1/44
Inventor 戴骐林晓娜吴艳燕陈笑梅陈俊晓楼士铭
Owner THE INSPECTION & QUARANTINE TECH CENT ZHEJIANG ENTRY EXIT INSPECTION & QUARANTINE BUREAU
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