Method for determining heavy metal content of sugarcane with electric heating board digestion/ICP-MS (inductively coupled plasma mass spectrometry) methods

Abstract

The invention discloses a method for determining heavy metal content of sugarcane with electric heating board digestion / ICP-MS (inductively coupled plasma mass spectrometry) methods. The method comprises following steps: 1), sample pretreatment is performed: a sugarcane sample is selected and subjected to digestion and heating digestion, after digestion is finished, residues in a glass beaker are dissolved and washed with 2mL of a salpeter solution (prepared from nitric acid and water through isovolumetric mixing) in a 50-mL volumetric flask, a product is subjected to repeated washing with ultrapure water and constant volume processing until the product reaches the volumetric flask scale and is shaken uniformly to serve as a sample solution for online determination; 2), multiple blank solutions are prepared according to the step 1 except that the sugarcane sample is not added; 3), a standard solution is prepared from a mixed standard storage solution containing multiple elements including Cu, Zn, Pb, Cd, As and Ni, and a working curve of the standard solution is determined; 4), ICP-MS determination is performed. With the adoption of the method, the heavy metal content of the sugarcane can be detected simply, rapidly, efficiently and accurately.

Description

technical field [0001] The invention relates to a method for determining the content of heavy metals, in particular to a method for determining the content of heavy metals in sugarcane by an electric heating plate digestion / ICP-MS method. Background technique [0002] At present, food safety is an important issue that people generally pay attention to, and the content of heavy metals in crops has a great impact on human health. The monitoring and prevention of heavy metal pollution has become a hot issue of concern to all countries. In recent years, my country's urbanization process has been accelerating, and the "three wastes" produced by mining and smelting have increased, seriously polluting the water, air, and soil in the region, resulting in crop yields and The decline in quality, through the transmission and amplification of the food chain, has a negative impact on people's lives and seriously threatens human health. Therefore, analyzing the content of heavy metals in ...

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Problems solved by technology

[0003] In recent years, the farmland around some mining areas in Guangxi has been severely polluted by heavy metals. The heavy metal content of sugarcane planted on the farmland has accumulated significantly, which poses a risk to the safety of sugar. However, there is a lack of an efficient and unified standard method to monitor heavy metals in sugarcane in China, and There are very few research reports on the determination methods of heavy metals in sugarcane

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