Determination of mercury in apples by spark source mass spectrometry (CAT#: STEM-ST-0266-LJX)

Introduction

Mercury-contaminated food mainly pollures water bodies through industrial wastewater containing mercury, which pollures fish, shrimp and shellfish in water bodies. The use of mercury-containing pesticides directly contaminate plant food raw materials, and at the same time, the excessive mercury content in farmland silt will also lead to mercury pollution of agricultural products or other aquatic organisms. Mercury into the human body after the main invasion of the nervous system, especially the central nervous system, the most serious damage is the cerebellum and brain.

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Principle Applications Procedure Materials Notes Related Products

Principle

By using vacuum spark discharge, the energy accumulated in a small volume can make the material in the volume suddenly evaporate and ionize, so as to obtain the characteristic ion current information.

Applications

(1) Solid spark source mass spectrometry: impurity analysis of high-purity materials, which can be applied to semiconductor materials, non-ferrous metals, and building materials industries;
(2) Gas isotope mass spectrometry: determination of stable isotopes C, H, N, O, S and radioactive isotopes Rb, Sr, U, Pb, K, Ar, which can be applied to geology, petroleum, medicine, environmental protection and agriculture.

Procedure

(1) An electric field is applied between the electrodes to ionize part of the carrier gas (such as argon) in the electric field;
(2) The "cathode ray" or "anode ray" generated by ionization accelerates in the direction of the opposite polarity in the residual gas, bombards the anode or cathode, and vaporizes a part of the substance to be measured on the plate;
(3) Part of the atoms of the vaporized substance are ionized in the subsequent discharge process.

Materials

• Sample Type:
Apples

Notes

Before starting the machine, check whether the water (water cooler), electricity, gas (argon/nitrogen), temperature, humidity, and exhaust air of the instrument are normal.

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