Summary
A combination of 6 μg palladium and 15 μg magnesium nitrate is proposed as chemical modifier for lead determinations in biological materials and foodstuffs. The applicability of this modifier was investigated by the analysis of several types of samples, as compared to the classical NH4H2PO4 and Mg(NO3)2 modifier. Direct determinations of lead against aqueous standard solutions can be performed in 3-fold diluted urine, 2-fold diluted milk and 6-fold diluted blood, when the proposed modifier is added. A method for lead determinations in potatoes using the combined palladium and magnesium nitrate modifier, after a microwave acid digestion, is described. The optimum GFAAS pyrolysis temperature remains dependent on the matrix and should be determined for each type of sample. A wider linear range of the calibration curve is observed when the proposed Pd modifier is used.
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References
Schlemmer G, Welz B (1986) Spectrochim Acta B 41:1157–1165
Jin L, Ni Z (1981) Can J Spectrosc 26:219–225
Shan X, Ni Z (1982) Can J Spectrosc 27:75
Shan X, Ni Z, Zhang L (1983) Anal Chim Acta 151:179–185
Shan X, Hu K (1985) Talanta 32:23–26
Hinds MW, Katyal M, Jackson KW (1988) J Anal At Spectrom 3:83–87
Welz B, Schlemmer G, Mudakavi JR (1988) J Anal At Spectrom 3:93–97
Welz B, Schlemmer G, Mudakavi JR (1988) J Anal At Spectrom 3:695–701
Lynch S, Littlejohn D (1989) J Anal At Spectrom 4:157–161
Rettberg TM, Beach LM (1989) J Anal At Spectrom 4:427–432
Smeyers-Verbeke J, Yang Q, Penninckx W, Vandervoort F (1990) J Anal At Spectrom 5:393–398
Hinds MW, Jackson KW (1990) J Anal At Spectrom 5:199–202
Yin X, Schlemmer G, Welz B (1987) Anal Chem 59:1462–1466
Sthapit PM, Ottaway JM, Halls DJ, Fell GS (1984) Anal Chim Acta 165:121–130
Wendl W, Muller-Vogt G (1988) J Anal At Spectrom 3:63–66
Vollkopf U, Grobenski Z, Welz B (1983) At Spectrosc 4:165–170
Beaty M, Barnett W, Grobenski Z (1986) At Spectrosc 1:72
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Penninckx, W., Massart, D.L. & Smeyers-Verbeke, J. Effectiveness of palladium as a chemical modifier for the determination of lead in biological materials and foodstuffs by graphite furnace atomic absorption spectrometry. Fresenius J Anal Chem 343, 526–531 (1992). https://doi.org/10.1007/BF00322163
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DOI: https://doi.org/10.1007/BF00322163