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High-throughput super microwave digestion pretreatment method for analyzing multi-element content in food based on icpms and icpoes

A super microwave digestion and high-throughput technology, which is applied in the field of high-throughput super microwave digestion pretreatment, can solve the problems of wasting time and high cleaning equipment prices, and achieve the effects of improving processing efficiency, low cost and simplifying the operation process

Active Publication Date: 2018-03-13
GUANGZHOU INSPECTION TESTING & CERTIFICATION GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Cleaning equipment is generally expensive and takes time to process

Method used

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  • High-throughput super microwave digestion pretreatment method for analyzing multi-element content in food based on icpms and icpoes
  • High-throughput super microwave digestion pretreatment method for analyzing multi-element content in food based on icpms and icpoes
  • High-throughput super microwave digestion pretreatment method for analyzing multi-element content in food based on icpms and icpoes

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Embodiment 1

[0024] Example 1: Dedicated digestion tube support for 40 super microwaves

[0025] A high-throughput super microwave digestion pretreatment method for analyzing multi-element content in food based on ICPMS and ICPOES, the method comprises the following steps:

[0026] 1) The amount of food sample in each quartz digestion reaction tube placed in a 40-position super microwave dedicated digestion tube support is 0.3-0.5g (calculated on a dry basis, if the food matrix has a lot of moisture, the amount of the sample can be increased appropriately, edible oil or oil matrix sample weighing 0.3g), add 7-8mL of nitric acid solution with a volume ratio of nitric acid and water of 1:1.2 (add 9mL nitric acid solution to the oil sample), cover the special cover of the quartz digestion reaction tube; all digestion reactions The tube is inserted into the 40-position super microwave dedicated digestion tube holder, which can digest 40 samples at the same time;

[0027] 2) Inject 250mL of de...

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Abstract

The invention discloses a high-flux super microwave digestion pretreatment method for analyzing multielement content of foods based on ICPMS and ICPOES. The microwave digestion pretreatment is carried out by low-acidity digestion solution on the basis of high-temperature resisting property of the super microwave, thus the reaction severity in the microwave digestion process is inhibited; the sample organic matter can be fully oxidized and decomposed under a high working temperature (220 DEG C), so that the stable digestion process can reach the digestion terminal, and clear and transparent digestion solution is obtained; meanwhile, before digestion, the sample fluid to be digested does not need to vortex vibrate or stay overnight, other reagent is not further added; moreover, the subsequent acid catching step of the digestion fluid is saved, the operation process is greatly simplified, the treatment efficiency is improved and the pollution is reduced; moreover, contents of multiple elements in different types of foods can be tested at the same time.

Description

Technical field: [0001] The invention relates to the technical field of food detection, in particular to a high-throughput super microwave digestion pretreatment method for analyzing multi-element content in food based on ICPMS and ICPOES. Background technique: [0002] Traditional microwave digestion generally uses high-acidity digestion solution for microwave digestion (the digestion temperature should not be too high, the working temperature should not exceed 200°C, and the maximum temperature should not exceed 280°C), so the acidity of the digestion solution is too low, and it is difficult to digest all samples in the later stage. The organic matter is completely decomposed, and the digestion solution will become turbid. Super microwave digestion technology is a pretreatment technology for elemental analysis developed by introducing foreign technology in China in the past ten years. This method adopts the reaction kettle integrated pressure digestion technology to reali...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/44G01N21/73
CPCG01N1/44G01N21/73
Inventor 党华邱志超李姗赵一霖李吉龙李琼黄少漫李俞洁何霜陈朝坚
Owner GUANGZHOU INSPECTION TESTING & CERTIFICATION GRP CO LTD
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