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
[11]  
Eckerlin R.H., 1987, ATOM SPECTROSC, V8, P64
[12]  
Ediger R, 1975, AT ABSORPT NEWSLETT, V14, P127
[13]  
EDIGER RD, 1976, ATOM ABSORPT NEWSL, V15, P145
[14]   FLOW-INJECTION ONLINE SORBENT EXTRACTION PRECONCENTRATION FOR GRAPHITE-FURNACE ATOMIC-ABSORPTION SPECTROMETRY [J].
FANG, Z ;
SPERLING, M ;
WELZ, B .
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY, 1990, 5 (07) :639-646
[15]  
Fernandez F. J., 1981, Atomic Spectroscopy, V2, P73
[16]   INVESTIGATIONS OF REACTIONS INVOLVED IN FLAMELESS ATOMIC-ABSORPTION PROCEDURES .7. THEORETICAL AND EXPERIMENTAL-STUDY OF FACTORS INFLUENCING THE DETERMINATION OF SILICON [J].
FRECH, W ;
CEDERGREN, A .
ANALYTICA CHIMICA ACTA, 1980, 113 (02) :227-235
[17]   EFFECTS OF MODIFIER MASS AND TEMPERATURE-GRADIENTS ON ANALYTE SENSITIVITY IN ELECTROTHERMAL ATOMIC-ABSORPTION SPECTROMETRY - INVITED LECTURE [J].
FRECH, W ;
LI, K ;
BERGLUND, M ;
BAXTER, DC .
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY, 1992, 7 (02) :141-145
[18]  
GLADNEY ES, 1977, ATOM ABSORPT NEWSL, V16, P114
[19]  
Hinderberger E.J., 1981, ATOM SPECTROSC, V2, P1
[20]  
JIN LZ, 1981, CAN J SPECTROSC, V26, P219