Atomic fluorescence spectrometry for detecting Cr (VI), and atomic fluorescence spectrometer thereof

Abstract

The present invention discloses an atomic fluorescence spectrometry for detecting Cr (VI), and an atomic fluorescence spectrometer thereof. The atomic fluorescence spectrometer comprises an evaporator, an excitation light source, an atomizer, a photoelectric detector and a computer. The evaporator comprises a sealed housing, a heating boat and power supply. The heating boat is arranged inside thesealed housing. The sealed housing is provided with a gas inlet and a gas exhaust port. The heating boat is connected with the power supply. The gas exhaust port of the evaporator is connected with the atomizer by a duct. The atomic fluorescence spectrometry comprises the following steps: heating a sample requiring detection in mixed gas comprising hydrogen and argon to a temperature of 1000-1400DEG C until the sample requiring detection is dried and ashed; heating the ashed residue to the temperature of 2000-2600 DEG C, carrying out secondary atomization for the resulting vapour; adopting atomic fluorescence to detect the Cr (VI) content. The atomic fluorescence spectrometry for detecting the Cr (VI), and the atomic fluorescence spectrometer of the present invention have high sensitivity, simple spectral line and low interference.

Description

technical field [0001] The invention relates to an atomic fluorescence spectrometry and a spectrometer for detecting Cr(VI). Background technique [0002] At present, a large number of literatures have reported the speciation analysis of chromium. The reason why people pay attention to the speciation of chromium is that different forms of chromium have different toxicological and ecological effects. Studies have shown that whether chromium behaves as an essential element or a harmful element, its valence plays a decisive role. Cr(III) is an essential trace element for the human body and is indispensable for normal glucose and lipid metabolism. Chromium deficiency can cause various diseases such as arteriosclerosis. For humans, it is generally believed that Cr(VI) is 100 times more toxic than Cr(III). Cr(VI) has strong toxicity and is one of the confirmed carcinogens, so it is not enough to detect the total amount of Cr, and the specific form must also be analyzed. Therefo...

AI Technical Summary

Problems solved by technology

Hexavalent chromium (Cr) cannot be detected by the existing hydride generation-non-dispersive atomic fluorescence spectrometer because its sensitive line (357.87nm) is not in the above-mentioned solar blind zone

Images