A NEW CONTINUOUS HYDRIDE GENERATOR FOR THE DETERMINATION OF ARSENIC, ANTIMONY AND TIN BY HYDRIDE GENERATION ATOMIC-ABSORPTION SPECTROMETRY

被引:64
作者
LE, XC
CULLEN, WR
REIMER, KJ
BRINDLE, ID
机构
[1] ROYAL ROADS MIL COLL,DEPT CHEM,FMO,VICTORIA V0S 1B0,BC,CANADA
[2] BROCK UNIV,DEPT CHEM,ST CATHARINES L2S 3A1,ONTARIO,CANADA
关键词
ATOMIC ABSORPTION SPECTROMETRY; HYDRIDE GENERATION; ANTIMONY; ARSENIC; TIN;
D O I
10.1016/0003-2670(92)85106-G
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
A new continuous hydride generator is described. Its characteristics are compared with a conventional hydride generator for the determination of arsenic, antimony and tin by using flame atomic absorption spectrometry. This simple hydride generator combines hydride production and gas-liquid separation in one unit, obviating the use of a separate mixing/reaction coil and gas-liquid separator. Radioactive tracer studies show that a hydride generation efficiency of over 95% is achieved with the new hydride generator and that approximately 90% of monomethylarsonic acid (MMA) is converted to its hydride (methylarsine) within the first 10 s of the hydride generation reaction. Compared to a conventional hydride generator, an improved signal-to-noise ratio is achieved and comparable or less interference from transition metal ions is observed. Cysteine (1% in the sample solution) is effective in reducing interferences during the hydride generation processes. In the presence of cysteine, 10-1000 fold higher amounts of Ni2+, Co2+ and Cu2+ are tolerated in the determination of arsenic, antimony and tin. Cysteine also enhances the signals of arsenic, antimony and tin by 60, 200 and 40%, respectively. Reaction conditions were optimized by using both the simplex optimization method and one-factor-at-a-time method and results are in good agreement.
引用
收藏
页码:307 / 315
页数:9
相关论文
共 24 条
[1]   MICROPOROUS POLYTETRAFLUOROETHYLENE TUBING GAS-LIQUID SEPARATOR FOR HYDRIDE GENERATION AND INDUCTIVELY COUPLED PLASMA ATOMIC EMISSION-SPECTROMETRY [J].
BARNES, RM ;
WANG, XR .
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY, 1988, 3 (08) :1083-1089
[2]  
Bayne C. K., 1986, PRACTICAL EXPT DESIG
[3]   INTERFERENCE REDUCTION BY L-CYSTINE IN THE DETERMINATION OF ARSENIC BY HYDRIDE GENERATION [J].
BOAMPONG, C ;
BRINDLE, ID ;
LE, XC ;
PIDWERBESKY, L ;
PONZONI, CMC .
ANALYTICAL CHEMISTRY, 1988, 60 (11) :1185-1188
[4]   DETERMINATION OF TRACE AMOUNTS OF TIN BY HYDRIDE GENERATION DIRECT-CURRENT PLASMA ATOMIC EMISSION-SPECTROMETRY - INTERFERENCE REDUCTION BY L-CYSTINE [J].
BRINDLE, ID ;
LE, XC .
ANALYST, 1988, 113 (09) :1377-1381
[5]   REDUCTION OF INTERFERENCES IN THE DETERMINATION OF GERMANIUM BY HYDRIDE GENERATION AND ATOMIC EMISSION-SPECTROMETRY [J].
BRINDLE, ID ;
LE, XC .
ANALYTICA CHIMICA ACTA, 1990, 229 (02) :239-247
[6]   CONVENIENT METHOD FOR THE DETERMINATION OF TRACE AMOUNTS OF GERMANIUM BY HYDRIDE GENERATION DIRECT-CURRENT PLASMA ATOMIC EMISSION-SPECTROMETRY - INTERFERENCE REDUCTION BY L-CYSTINE AND L-CYSTEINE [J].
BRINDLE, ID ;
LE, XC ;
LI, XF .
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY, 1989, 4 (02) :227-232
[7]   SAMPLE INTRODUCTION TECHNIQUES FOR ATOMIC SPECTROSCOPY [J].
BROWNER, RF ;
BOORN, AW .
ANALYTICAL CHEMISTRY, 1984, 56 (07) :A875-+
[8]   COLD VAPOR ATOMIC-ABSORPTION DETERMINATION OF MERCURY BY FLOW-INJECTION ANALYSIS USING A TEFLON MEMBRANE PHASE SEPARATOR COUPLED TO THE ABSORPTION CELL [J].
DEANDRADE, JC ;
PASQUINI, C ;
BACCAN, N ;
VANLOON, JC .
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY, 1983, 38 (10) :1329-1338
[9]   OPTIMIZATION OF HYDRIDE GENERATION METHODS FOR AAS [J].
DEDINA, J .
FRESENIUS ZEITSCHRIFT FUR ANALYTISCHE CHEMIE, 1986, 323 (07) :771-782
[10]  
DEDINA J, 1988, PROG ANAL SPECTROSC, V11, P251