Determination of Trace Sulfur in Ammonium Paratungstate by High Frequency Combustion Infrared-Absorption Spectroscopy
Received:January 05, 2016  Revised:March 10, 2016
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DOI:doi:10.3969/j.issn.2095-1035.2016.02.013
KeyWord:high frequency combustion; infrared-absorption spectroscopy; ammonium paratungstate; trace sulfur
     
AuthorInstitution
LU Zhengjie 泰安市产品质量监督检验所,山东 泰安
GUO Feifei 钢研纳克检测技术有限公司技术中心,北京
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Abstract:
      High frequency combustion infrared- absorption spectroscopy was applied to the determination of trace sulfur in ammonium paratungstate (APT). Based on the material properties of APT and the performance of high frequency combustion infrared- absorption spectroscopy, experiments conditions, including sample pretreatment, sample weight, dosage of the flux and choice of the flux and calibration materials, were performed. The optimized experiment conditions were obtained as follows: a 1 g APT was weighted with pretreatment, and 0.3 g pure iron and 0.3 g tungsten flux were added. Under the optimized experimental conditions, the relative standard deviation (RSD, n = 5) was less than 8% with the recovery rate of 98%~109%.
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