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ICP-MS detection method for content of heavy metal in preserved vegetable

An ICP-MS and detection method technology, which is applied in the field of ICP-MS detection of heavy metal content in mustard mustard, can solve the problems of large sample demand, matrix spectrum interference, and insufficient detection limit, and achieve simple sample pretreatment, low interference The effect of less and lower detection limit

Inactive Publication Date: 2014-10-22
涪陵出入境检验检疫局
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Problems solved by technology

ICP-OES is also a multi-element analysis, with a wide range of applications, a large demand for samples, a detection limit that is not low enough, and various unknown and complex matrix spectral interferences.
However, ICP-MS requires less samples, has a wide dynamic range, lower detection limit, less interference and is easy to eliminate. It has been gradually applied in food testing, but there is no ICP-MS for heavy metal content in pickled mustard. MS detection method

Method used

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  • ICP-MS detection method for content of heavy metal in preserved vegetable
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Embodiment Construction

[0030] The ICP-MS detection method of heavy metal content in pickled mustard, its steps are:

[0031] 1. Selection of instruments and reagents

[0032] Instruments: Inductively coupled plasma mass spectrometer Varian 820, analytical balance Xps204, microwave digestion instrument CEM MARS.

[0033] Reagents: superior pure nitric acid with ρ=1.42g / mL, superior pure hydrogen peroxide with a mass percentage concentration of 30%, lead standard stock solution with a concentration of 1000mg / L, arsenic standard stock solution with a concentration of 1000mg / L, Mercury standard stock solution with a concentration of 1000mg / L, cadmium standard stock solution with a concentration of 1000mg / L, aluminum standard stock solution with a concentration of 1000mg / L, copper standard stock solution with a concentration of 1000mg / L, Chromium standard stock solution, scandium standard stock solution with a concentration of 1000mg / L, yttrium standard stock solution with a concentration of 1000mg / L, b...

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Abstract

The invention relates to a detection method for content of heavy metal in preserved vegetable and in particular relates to a method for detecting the content of heavy metals, such as lead, arsenic, mercury, cadmium, aluminum, copper and chromium in preserved vegetable by use of ICP-MS (Inductively Coupled Plasma-Mass Spectrometry). The method comprises the steps of selecting instruments and reagents, preparing a standard solution, digesting a sample, detecting by use of the instruments and the like. The method is capable of quickly and accurately detecting the contents of lead, arsenic, mercury, cadmium, aluminum, copper and chromium in the preserved vegetable.

Description

technical field [0001] The invention relates to a method for detecting heavy metal content in pickled mustard, in particular to a method for detecting the content of lead, arsenic, mercury, cadmium, aluminum, copper, chromium and other heavy metals in mustard mustard by ICP-MS. Background technique [0002] In recent years, foreign countries have become more and more strict on the limit of heavy metals in food. For example, the European Union requires the limit of lead in vegetables to be less than 0.10mg / kg, the limit of cadmium in vegetables is less than 0.10mg / kg, Japan requires the limit of arsenic in vegetables to be less than 1.0mg / kg, etc. . my country also attaches great importance to the pollution of heavy metals. In GB2762-2012, the limits of some heavy metal pollutants in food have also been formulated, and relevant national standards for the detection of various heavy metals have been stipulated. The detection methods mainly include colorimetry, chromatography, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/62
Inventor 吴杰刘闯唐璜王安良刘燕吴晓红张天莲赵维
Owner 涪陵出入境检验检疫局
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