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Method for determining traces of mercury, cadmium, lead and arsenic in food by inductively coupled plasma mass spectrometry (ICP-MS)

An ICP-MS, food technology, applied in the direction of measuring devices, material analysis by electromagnetic means, instruments, etc., can solve the problems of sensitivity, precision, and accuracy that cannot meet the requirements of trace analysis

Inactive Publication Date: 2014-07-23
GUANGZHOU KINGMED DIAGNOSTICS CENT
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  • Abstract
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Problems solved by technology

The development of this monitoring work provides basic data for mastering the pollution level and changing trend of major pollutants in food, conducting food safety risk assessment and formulating national food safety standards, but how to ensure the accuracy of trace or ultra-trace analysis is also a problem. Outstanding issues
[0003] The determination of mercury, cadmium, lead, and arsenic in GB5009 "Physical and Chemical Parts of Food Sanitation Inspection Methods" and related standards mainly uses spectrophotometry, atomic absorption method and atomic fluorescence method, and some standard methods have been improved in terms of sensitivity, precision and accuracy. Unable to meet trace analysis requirements

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  • Method for determining traces of mercury, cadmium, lead and arsenic in food by inductively coupled plasma mass spectrometry (ICP-MS)
  • Method for determining traces of mercury, cadmium, lead and arsenic in food by inductively coupled plasma mass spectrometry (ICP-MS)
  • Method for determining traces of mercury, cadmium, lead and arsenic in food by inductively coupled plasma mass spectrometry (ICP-MS)

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Embodiment Construction

[0012] Main instruments and reagents

[0013] American Agilent7700X inductively coupled plasma mass spectrometer with ORS 3 Collision cell and HMI sampling system; Beijing Sartorius CP225D electronic balance with a sensitivity of 0.1 mg; Italian Milestone Ethos One microwave digestion instrument with a 41-position polytetrafluoroethylene microwave digestion tank with an inner diameter of 23.7 mm and an outer diameter of 23.7 mm. Diameter 29.8mm, tank height 151mm; Beijing Labtech VB24 type acid catcher, 24 holes, hole diameter 30.8mm, hole depth 60.0mm.

[0014] The analysis water is the first-class water specified in GB / T6682, with a resistivity ≥ 18.2MΩ.cm; nitric acid, high-grade pure; nitric acid solution, measure 100mL of nitric acid, dilute to 1000mL with water, mix well and set aside. Gold solution [GSB04-1715-2004] is 1000mg / L; 10mg / L gold solution, absorb 1mL of 1000mg / L gold solution, dilute to 100mL with 20% hydrochloric acid, mix well and set aside. Argon, liquid...

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Abstract

The invention belongs to the technical field of food safety detection, and particularly provides a method for determining traces of mercury, cadmium, lead and arsenic in a food by a microwave digestion-inductively coupled plasma mass spectrometry (ICP-MS).

Description

technical field [0001] The invention belongs to the technical field of food safety detection. Specifically, the invention provides a method for measuring trace amounts of mercury, cadmium, lead and arsenic in food by using microwave digestion-inductively coupled plasma mass spectrometry (ICP-MS). Background technique [0002] Mercury, cadmium, lead, arsenic and other metal pollutants in food have attracted much attention because they may pose a greater risk to public health. Lead is listed as Category 1, lead is listed as Category 2B, methylmercury and mercury are listed as Category 2B and Category 3 carcinogens, respectively. The International Food Codex Alimentarias Commission (CAC) tentative human weekly acceptable intake (PTWI) is: mercury 0.005mg / kg.B.W, methylmercury 0.0016mg / kg.B.W, cadmium 0.007mg / kg. B.W, lead 0.025mg / kg.B.W and arsenic 0.015mg / kg.B.W. GB2762-2012 "National Food Safety Standard Limits of Contaminants in Food" released in 2013 stipulates stricter l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/62
Inventor 唐竞张远志陈斯佳黎楚瑜舒凤孔祥词林霖玉
Owner GUANGZHOU KINGMED DIAGNOSTICS CENT
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