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Method for measuring boric acid and borate in cosmetics by microwave digestion -ICP-OES

A microwave digestion and cosmetic technology, which is used in the preparation of test samples, thermal excitation analysis, material excitation analysis, etc., can solve the problems of poor reproducibility, cumbersome operation and processing steps, low sensitivity, etc., and achieve improved recovery and specificity. Strong, sensitive effect

Inactive Publication Date: 2011-11-09
THE INSPECTION & QUARANTINE TECH CENT ZHEJIANG ENTRY EXIT INSPECTION & QUARANTINE BUREAU
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Problems solved by technology

[0005] In order to overcome the technical defects of cumbersome operation and processing steps, low sensitivity, poor stability, and poor reproducibility in the existing assay method, the purpose of the present invention is to provide a microwave digestion-ICP-OES method for determining boric acid and borate in cosmetics

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  • Method for measuring boric acid and borate in cosmetics by microwave digestion -ICP-OES
  • Method for measuring boric acid and borate in cosmetics by microwave digestion -ICP-OES
  • Method for measuring boric acid and borate in cosmetics by microwave digestion -ICP-OES

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Embodiment Construction

[0036] 1. The use of equipment and equipment conditions

[0037] 1.1 Instrument used: Inductively Coupled Plasma-Atomic Emission Spectrometer (ICP-OES), model: VARIAN720ES.

[0038] 1.2 Instrument working conditions, see Table 2.

[0039] 2. Use reagents:

[0040] 2.1 The reagents used are of superior grade, and the experimental water is the first-grade water specified in GB / T6682.

[0041] 2.2 Nitric acid (ρ1.42g / mL); hydrogen peroxide (30% aqueous solution).

[0042] 2.3 Boron standard stock solution: use national standard reagent (GBW), the concentration is 1000μg / mL.

[0043] 2.4 Yttrium standard stock solution: use national standard reagent (GBW), the concentration is 100μg / mL.

[0044] 2.5 Boron standard working solution: Accurately draw 1.0mL boron standard stock solution (GBW) into a 100mL volumetric flask, dilute with 5% nitric acid solution to volume, this standard stock solution is equivalent to 10μg boron per milliliter.

[0045] 3. Sample Digestion

[0046] We...

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Abstract

The invention relates to a method for detecting the content of boric acid and borate in cosmetics. A method for measuring boric acid and borate in cosmetics by microwave digestion -ICP-OES comprises the following steps of: performing microwave digestion on a cosmetic sample through nitric acid and hydrogen peroxide to decompose organic substances, guiding sample solution into an inductive coupling plasma atomic emission spectrometer atomizer to form aerosol, loading the aerosol into high-temperature high-frequency plasma by argon to generate ionization and generate a characteristic spectral line, and measuring the spectral line intensity of a boron element and an internal standard yttrium element in the sample solution, wherein the intensity of the boron element is in direct proportion tothe content of the boron element; and correcting a response value of the boron element according to the ratio of an actually measured yttrium internal standard response value to an expected internal standard response value, performing quantitative measurement by adopting a standard curve method, calculating the content of the boron element in the cosmetics, and obtaining the content of the boric acid and the borate through conversion coefficients. The method has the characteristics of strong specificity, high sensitivity and accurate result.

Description

technical field [0001] The invention relates to a method for detecting boric acid and borate content in cosmetics, in particular to a method for measuring boric acid and borate content in cosmetics using microwave digestion-inductively coupled plasma atomic emission spectroscopy (ICP-OES) detection technology method of measurement. 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 continuous 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 restricte...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/73G01N1/44
Inventor 戴骐吴艳燕林晓娜陈笑梅朱海强
Owner THE INSPECTION & QUARANTINE TECH CENT ZHEJIANG ENTRY EXIT INSPECTION & QUARANTINE BUREAU
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