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《Physical Testing and Chemical Analysis Partb Chemical Analgsis》 2001-11
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DETERMINATION OF PHOSPHOROUS IN FOOD BY THE LASER-INDUCED FLUORESCENCE QUENCHING METHOD WITH MULTI-CHANNEL DETECTOR

ZHOU Ying, LI Yuang qian (Dept. of Public Health, West China University of Medical Sciences, Chengdu 610041, China) YANG Jing guo (Dept. of Physics, Sichuan University)  
Based on the fluorescence quenching effect due to the formation of heteropoly acid of phosphate and molybdate in the fluorescence reaction system of rhodamine 6G and ammonium molybdate, a relatively sensitive and selective method for the determination of phosphorus in food is proposed. The reaction is carried out in a HCl medium of 0.096mol·L -1 . Laser is used as excitation light source to enhance the sensitivity of the fluorescence reaction and CCD diode array detector is used in the detection of fluorescence intensity. A computerized hyphenated instrument of laser induced fluorescence and CCD diode array detector is installed by the authors. Multiwavelength measurements can be done simultaneously. The proposed method including the special installation is proved to have good sensitivity and selectivity. A detection limit as low as 0.1ng·ml -1 is achieved. Recoveries obtained by the standard addition test are in the range of 90.6%~109.0%. RSD′s found are in the range from 1.3% to 3.0% at the concentration levels of 7.6~1.7mg·g -1 . The presented method has been used in the analysis of cereal and milk powder.
【Fund】: 国家自然科学基金 ( 39770 6 46 );; 国家教委博士点基金 ( 976 0 )资助课题
【CateGory Index】: O657.3
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Chinese Journal Full-text Database 2 Hits
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Chinese Journal Full-text Database 4 Hits
1 Song Gongwu Centre of Analysis, Hubei University, Wuhan;FLOW INJECTION ANALYSIS FOR TRACE PHOSPHORUS DETERMINATION WITH FLUORESCENCE QUENCHING OF RHODAMINE 6G WITH MOLYBDOPHOSPHATE[J];Spectroscopy and Spectral Analysis;1991-03
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【Co-citations】
Chinese Journal Full-text Database 10 Hits
1 JIANG Zhiliang LI Fang WANG Shengmian LIANG Hong (Centre of Computer & Analysis Testing, Guangxi Normal Vniversity Guilin 541004);Study on the Spectorofluorimetric System of PM\-O Hetoropoly Acid and Rhodamine B and Its Application[J];ANALYSIS AND TESTING TECHNOLOGY AND INSTRUMENTS;1999-03
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【Co-references】
Chinese Journal Full-text Database 1 Hits
1 WU Xianxin, CHEN Tianyu, WANG Anbao(Shanghai Research Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China);AXIAL-VIEW ICP-AES DETERMINATION OF PHOSPHORUS IN PHOSPHORUS-FREE WASHING POWDER[J];Physical Testing and Chemical Analysis Part B Chemical Analysis;2003-09
【Secondary Citations】
Chinese Journal Full-text Database 5 Hits
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