Inductively coupled plasma mass spectrometer coupling interface device and analysis method

Abstract

The invention provides an inductively coupled plasma mass spectrometer coupling interface device and an analysis method. The inductively coupled plasma mass spectrometer coupling interface device comprises a torch interface, a carrier gas mass flowmeter, an auxiliary gas mass flowmeter, a flow splitting T-joint, a flow combining T-joint, a carrier gas pipe, an auxiliary gas pipe and the like. The device is simple in structure and solves the problems that a plasma torch is flamed out, signals are unstable and the sensitivity is low when a tungsten wire capture electrothermal vaporization solid sampling device is coupled with an inductively coupled plasma mass spectrometer. The inductively coupled plasma mass spectrometer coupling interface device and the analysis method have the advantage that the detection of trace cadmium can be realized without performing digestion treatment to food samples, and have the characteristics of directness, quickness, high sensitivity, good stability and the like.

Description

technical field [0001] The invention belongs to the field of food safety detection, and relates to an interface device and an analysis method for an inductively coupled plasma mass spectrometer for measuring cadmium in food. technical background [0002] At present, the agricultural environment and heavy metal cadmium pollution of agricultural products in some areas of my country are more prominent. In April 2014, the National Soil Pollution Survey Bulletin jointly issued by the Ministry of Environmental Protection and the Ministry of Land and Resources listed cadmium as the primary pollutant of the soil environment. Cadmium in the agricultural environment will accumulate in the edible part through crop absorption, and enrich in livestock and aquatic products through the food chain, and finally enter the body of consumers to cause harm. After the "cadmium rice" incident in Hunan in 2013, cadmium pollution in agricultural products has always been the focus of consumers and t...

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Problems solved by technology

[0006] The purpose of the present invention is to address the above problems, to provide a tungsten wire capture electrothermal evaporation solid sampling device and an inductively coupled plasma mass spectrometer connection device, the device has a simple structure, and solves the problem of tungsten wire capture electrothermal evaporation solid sampling device and inductive coupling. When the plasma mass spectrometer is used in combination with the problems of plasma torch extinction, unstable signal and low sensitivity, the detection of trace cadmium can be realized without digestion of food samples, which has direct, rapid, high sensitivity and good stability Features

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