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Hydride generation atomic fluorescence spectrophotometry based on atomic absorption and atomic emission spectrophotometry, it is a unique trace analysis techniques. And as a spectral analysis technology, in recent years, atomic fluorescence spectrophotometry with high sensitivity, good selectivity, easy, and has been widely applied in the field of trace analysis. With the emerging of food hygiene, environmental protection, drinking water safety issues, precise and rapid detection of trace elements (arsenic, mercury, lead) and more attention. The tolerance of these trace elements is very low, and in higher doses, side effects may occur. China as the most populous country, food and heavy metals in water analysis, strict control of food and heavy metals in water, the development of a unified, convenient and effective analysis of measurement standards and methods to ensure the safety of people's lives and quality of life is imminent. This thesis by hydride generation atomic fluorescence spectrophotometry applied to the determination of elements such as arsenic in water has done the following: 1, analysis and presentation of arsenic speciation assay in principle to introduce a variety of detection methods, analysis and comparison, given the hydrogenated - atomic fluorescence spectrometry detection scheme and plan to conduct feasibility studies and analysis, the advantages of this approach. 2, analysis of the impact of the hydride generation atomic fluorescence spectrometry detection accuracy and detection limits factors and to optimize the detection scheme, and on this basis, given the design of the experimental system, the introduction and analysis of the experimental instrument, introduced experimental procedure and processes, and improvements of the experimental apparatus corresponding research. 3, the application of the AFS-230 dual channel atomic fluorescence spectrophotometer, the selected experimental conditions, according to the hydride generation atomic fluorescence spectrometry determination of arsenic content in water, the experimental study. First, research phototube negative high voltage, lamp current, height of atomizer, carrier gas flow rate, shielding gas flow, reading time, delay time on the determination results, the same time, the carrier concentration of potassium borohydride, oxidation system, The acidity, interfering ions and other factors discussed. The standard arsenic solution detection experiments, the results of the comparison of experimental data and arsenic speciation assay and found that the method has high sensitivity, matrix interference, high recovery rate, the detection limit is low; detection The system has a high degree of automation, simple operation, and reliable quality.
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