PALLADIUM NITRATE MAGNESIUM-NITRATE MODIFIER FOR ELECTROTHERMAL ATOMIC-ABSORPTION SPECTROMETRY .5. PERFORMANCE FOR THE DETERMINATION OF 21 ELEMENTS

被引:233
作者
WELZ, B
SCHLEMMER, G
MUDAKAVI, JR
机构
关键词
ELECTROTHERMAL ATOMIC ABSORPTION SPECTROMETRY; CHEMICAL MODIFIER; CHARACTERISTIC MASS; PYROLYSIS TEMPERATURE; SODIUM CHLORIDE AND POTASSIUM SULFATE INTERFERENCE;
D O I
10.1039/ja9920701257
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
The determination of 21 elements was investigated in the presence of the palladium nitrate-magnesium nitrate (Pd-Mg) mixed modifier. Significantly higher pyrolysis temperatures could be used for the majority of elements compared with previously recommended modifiers, making possible an efficient removal of concomitants prior to the atomization of analyte elements. A 10 mug amount (1 g l-1) of NaCl had no influence on the determination of all of the elements investigated and most of the analyte elements were not affected even by a ten times higher concentration. The concentration of potassium sulfate, which had no influence on the determination, was lower for most of the elements. The tolerance towards NaCl and K2SO4 increased significantly for a number of elements when the pyrolysis temperature was lowered by 200-300-degrees-C and the pyrolysis time was increased. For most of the elements investigated the characteristic mass values were comparable to, or better than published data. For some elements, however, such as bismuth, lead and tellurium, the characteristic mass was significantly higher. This resulted from the high stabilizing power of the Pd-Mg modifier, which necessitated higher atomization temperatures for these elements for which diffusional losses were more pronounced. The advantages and limitations of the Pd-Mg modifier are discussed
引用
收藏
页码:1257 / 1271
页数:15
相关论文
共 77 条
[21]   REDUCTION OF MATRIC INTERFERENCES IN FURNACE ATOMIC-ABSORPTION WITH THE LVOV PLATFORM [J].
KAISER, ML ;
KOIRTYOHANN, SR ;
HINDERBERGER, EJ ;
TAYLOR, HE .
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY, 1981, 36 (08) :773-783
[22]  
KIRKBRIGHT GF, 1980, ATOM SPECTROSC, V1, P85
[23]   THEORETICAL CALCULATION OF THE CHARACTERISTIC MASS IN GRAPHITE-FURNACE ATOMIC-ABSORPTION SPECTROMETRY [J].
LVOV, BV ;
NIKOLAEV, VG ;
NORMAN, EA ;
POLZIK, LK ;
MOJICA, M .
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY, 1986, 41 (10) :1043-1053
[24]   RECENT ADVANCES IN ABSOLUTE ANALYSIS BY GRAPHITE-FURNACE ATOMIC-ABSORPTION SPECTROMETRY [J].
LVOV, BV .
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY, 1990, 45 (07) :633-655
[26]   THE DETERMINATION OF MANGANESE BY ELECTROTHERMAL ATOMIC-ABSORPTION SPECTROMETRY WITH A GRAPHITE-FURNACE AT CONSTANT TEMPERATURE [J].
MANNING, DC ;
SLAVIN, W .
ANALYTICA CHIMICA ACTA, 1980, 118 (02) :301-306
[27]   THE DETERMINATION OF TRACE-ELEMENTS IN NATURAL-WATERS USING THE STABILIZED TEMPERATURE PLATFORM FURNACE [J].
MANNING, DC ;
SLAVIN, W .
APPLIED SPECTROSCOPY, 1983, 37 (01) :1-11
[28]   REACTION-KINETICS IN THE DETERMINATION OF SILICON BY GRAPHITE-FURNACE ATOMIC-ABSORPTION SPECTROMETRY [J].
MULLERVOGT, G ;
WENDL, W .
ANALYTICAL CHEMISTRY, 1981, 53 (04) :651-653
[29]  
Ni Z.-M., 1981, ACTA SCI CIRCUM, V1, P74
[30]  
NI ZM, 1987, SPECTROCHIM ACTA B, V42, P937