Comparative study of magnesium nitrate, palladium nitrate and reduced palladium for the direct determination of mercury in sea water by electrothermal atomization atomic absorption spectrometry

被引:14
作者
BermejoBarrera, P
MoredaPineiro, J
MoredaPineiro, A
BermejoBarrera, A
机构
[1] Dept. Analyt. Chem., Nutr. B., Faculty of Chemistry, University of Santiago de Compostela, A Coruña
关键词
electrothermal atomization atomic absorption spectrometry; mercury; sea water; modifiers; palladium nitrate; magnesium nitrate; reduced palladium;
D O I
10.1007/BF01244963
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
A comparative study of different chemical modifiers in graphite furnace atomic absorption spectrometry for the direct determination of mercury in sea water samples, in synthetic sea water sample of high (72.8 parts per thousand) and low 34.2 parts per thousand) salinity and in aqueous solutions, was carried out. The use of reduced palladium produces better results. The mixture of palladium nitrate and ascorbic acid, gives the best limit of detection (1.9 mu g l(-1)). The use of reduced palladium and magnesium nitrate produced excellent recoveries (close to 100%) in the whole salinity range for all mercury concentration tested. The use of palladium nitrate alone or combined with magnesium nitrate gave good recoveries with respect to a real sea water sample for low salinities. The interference from the major components of sea water were completely removed by using reduced palladium and magnesium nitrate modifiers. Thus, a single calibration curve with synthetic sea water may be applied to the analysis of sea water samples of widely differing salinities.
引用
收藏
页码:111 / 122
页数:12
相关论文
共 24 条
  • [11] PRINCIPLES OF ENVIRONMENTAL-ANALYSIS
    KEITH, LH
    CRUMMETT, W
    DEEGAN, J
    LIBBY, RA
    TAYLOR, JK
    WENTLER, G
    [J]. ANALYTICAL CHEMISTRY, 1983, 55 (14) : 2210 - 2218
  • [12] GRAPHITE-FURNACE ATOMIC-ABSORPTION METHOD FOR TRACE-LEVEL DETERMINATION OF TOTAL MERCURY
    KELLER, BJ
    PEDEN, ME
    RATTONETTI, A
    [J]. ANALYTICAL CHEMISTRY, 1984, 56 (13) : 2617 - 2618
  • [13] KIRKBRIGHT GF, 1980, ATOM SPECTROSC, V1, P85
  • [14] KUNERT I, 1974, ANAL CHIM ACTA, V106, P285
  • [15] GRAPHITE-FURNACE ANALYSIS - GETTING EASIER AND ACHIEVING MORE
    LITTLEJOHN, D
    EGILA, JN
    GOSLAND, RM
    KUNWAR, UK
    SMITH, C
    SHAN, XQ
    [J]. ANALYTICA CHIMICA ACTA, 1991, 250 (01) : 71 - 84
  • [16] LO J, 1975, ANAL CHEM, V47, P1865
  • [17] MAGYAR B, 1982, MIKROCHIM ACTA, V2, P407
  • [18] OWENS JW, 1976, ANAL CHEM, V48, P787, DOI 10.1021/ac60368a025
  • [19] SENSITIVITY ENHANCEMENT BY PALLADIUM ADDITION IN THE ELECTROTHERMAL ATOMIC ABSORPTION SPECTROMETRY OF MERCURY
    PING, L
    FUWA, K
    MATSUMOTO, K
    [J]. ANALYTICA CHIMICA ACTA, 1985, 171 (MAY) : 279 - 284
  • [20] EVALUATION OF ATOMIC-ABSORPTION WITH A HEATED GRAPHITE ATOMIZER FOR DIRECT DETERMINATION OF TRACE TRANSITION-METALS IN SEA-WATER
    SEGAR, DA
    GONZALEZ, JG
    [J]. ANALYTICA CHIMICA ACTA, 1972, 58 (01) : 7 - &