Fundamental studies on the coprecipitation of nanogram quantities of some metals with the dimethylgryoxime/Ni/1-(2-pyridylazo)-2-naphthol complex and their direct determination by atomic absorption spectrometry using an inner miniature cup for the solid sampling technique
Tóm tắt
A new easy, sensitive and accurate AAS method using an inner miniature cup in conjunction with a cupped type electrothermal graphite furnace for the solid sampling technique is proposed for the determination of sub-ppb levels of Cd, Cu, Mn, Pb and Zn in lake or sea water. It implies direct measurement of the coprecipitate obtained by using a combination of dimethylglyoxime (DMG) and nickel ion as carrier element an 1-(2-pyridylazo)-2-naphthol (PAN) as an auxiliary complexing agent. Fundamental studies on the coprecipitation with the DMG/Ni/PAN complex have been carried out to determine sub-ppb levels of elements in water samples. The analytical sensitivity compared with a conventional method using GF-AAS was increased at least 1,000-fold, because the measurement of the coprecipitates was without redissolution. The standard deviations for 0.1–0.5 ppb Mn in water samples were found to be 1–5%.
Tài liệu tham khảo
Statham PJ (1985) Anal Chim Acta 169:149–159
Aneva Z, Iancheva M (1985) Anal Chim Acta 167:371–374
Sthapit PR, Ottaway JM, Halls DJ, Fell GS (1984) Anal Chim Acta 165:121–130
Hambrick III GA, Froelich Jr PN, Andreae MO, Lewis BL (1984) Anal Chem 56:421–424
Mullins TL (1984) Anal Chim Acta 165:97–103
Nojiri Y, Kawai T, Otsuki A, Fuwa K (1985) Water Res 19:503–509
Oliveira E, McLaren JW, Berman SS (1983) Anal Chem 55:2047–2050
McLaren JW, Berman SS (1981) Appl Spectrosc 35:403–408
Berman SS, McLaren JW, Willie SN (1980) Anal Chem 52:488–492
Haas HF, Krivan V (1985) Fresenius Z Anal Chem 322:261–265
Kitamori T, Suzuki K, Sawada T, Gohshi Y, Motojima K (1986) Anal Chem 58:2275–2278
van den Berg CMG, Qiang Huang Z (1984) Anal Chem 56:2383–2386
Berndt H, Harms U, Sonneborn M (1985) Fresenius Z Anal Chem 322:329–333
Lin J, Satake M, Puri BK (1985) Analyst 110:1351
Burridge JC, Hewitt IJ (1985) Analyst 110:795
Hussain MF, Bansal RK, Puri BK, Satake M (1985) Analyst 110:1131
Atsuya I, Itho K (1983) Spectrochim Acta 38B:1259–1264
Atsuya I, Itho K, Akatsuka K, Jin K (1987) Fresenius Z Anal Chem 326:53–56
Itho K, Atsuya I (1987) Japan Analyst 36:390–395
Akatsuka K, Atsuya I (1987) Anal Chim Acta, in press
Akatsuka K, Atsuya I (1987) Fresenius Z Anal Chem 329:453–456