Sample Matrix-Assisted Photo-Induced Chemical Vapor Generation Atomic Fluorescence Spectrometric Determination Of Mercury In Wine Or Liquor Samples

The methods which are used to determination of mercury in wine all involve some problems. Firstly, the pre-treatment of wine sample is traditional mandatory. Acid used in mineralization of wine is harmful to healthy of people and can contaminate the environment. Secondly, the process is time consuming and labor intensive. High temperature will result in the lost of mercury. Thirdly, most of the methods may require an expensive instrument or a large amount of chemical reagents and matrix interferences are sometimes serious.Photo-induced chemical vapor generation is a new technique of chemical vapor generation methods. It has been applied to atomic spectrometry recent years. Based on the experiment that mercury ion was reduced to atomic mercury by formic acid in the condition of irradiation of UV, a new and unique photo-induced cold/chemical vapor generation, which directly uses sample matrix as reductant, was proposed for atomic fluorescence spectrometric detection of mercury in wine and liquor. The new method was thus termed as sample matrix-assisted PI-CVG. With the ultraviolet (UV) radiation, the sample matrix (ethanol) can reduce mercury compound or ion into atomic mercury, Hg0, which is subsequently swept (argon carrier gas) into atomic spectrometer for measurement. Under the optimized experimental conditions, the LOD for mercury was found to be 70 pg/mL with ethanol. The standard addition...