Determination of cadmium in river water by electrothermal atomic absorption spectrometry after internal standardization-assisted rapid coprecipitation with lanthanum phosphate.

Cadmium ranging from 1 - 8 ng could be coprecipitated quantitatively with lanthanum phosphate at pH 5 - 6 from up to 200 mL of river water samples spiked with 5 microg of indium as an internal standard. Cadmium and indium coprecipitated were measured by using electrothermal atomic absorption spectrometry. The cadmium content in the original sample solution could be determined by internal standardization with indium. Since complete collection of the precipitate and strict adjustment of the volume of the final solution after coprecipitation are not required in this method, the precipitate could be collected by using decantation and centrifugation, and then dissolved with 1 mL of about 2.4 mol L(-1) nitric acid. The proposed method is simple and rapid, and enrichment close to 200-times can be attained; the detection limit (3sigma, n = 6) was 0.63 ng L(-1) in 200 mL of the sample solution.

[1]  S. Kagaya,et al.  Application of internal standardization to rapid coprecipitation technique using lanthanum phosphate for flame atomic absorption spectrometric determination of iron and lead. , 2002, Analytical Sciences.

[2]  S. Kagaya,et al.  Coprecipitation with lanthanum phosphate as a technique for separation and preconcentration of iron(III) and lead , 2001, Fresenius' journal of analytical chemistry.

[3]  H. Sato,et al.  Coprecipitation of trace metal ions in water with bismuth(III) diethyldithiocarbamate for an electrothermal atomic absorption spectrometric determination. , 2001, Analytical sciences : the international journal of the Japan Society for Analytical Chemistry.

[4]  S. Kagaya,et al.  Flame atomic absorption spectrometric determination of lead in waste water and effluent after preconcentration using a rapid coprecipitation technique with gallium phosphate , 2000, Fresenius' journal of analytical chemistry.

[5]  Hirotoshi Sato,et al.  Electrothermal Atomic Absorption Spectrometric Determination of Cadmium after Coprecipitation with Nickel Diethyldithiocarbamate , 2000 .

[6]  C. Reimann,et al.  Chemical elements in the environment , 1998 .

[7]  Z. Chen,et al.  Comparison of carrier elements for coprecipitation and graphite-furnace atomic absorption spectrometry , 1997 .

[8]  Z. Chen,et al.  Coprecipitation with Microgram Quantities of Indium Hydroxide for the Determination of Trace Heavy Metals in Rain Water , 1995 .

[9]  S. Kagaya,et al.  Preconcentration of Indium(III) by Coprecipitation with Gallium Phosphate for Electrothermal Atomization Atomic Absorption Spectrometry , 1994 .

[10]  S. Kagaya,et al.  Differential Pulse Polarographic Determination of Lead Using a Rapid Coprecipitation Technique with Indium Hydroxide , 1994 .

[11]  H. Kawaguchi,et al.  Determination of trace heavy metals in natural water samples by coprecipitation with indium hydroxide/graphite-furnace AAS in the presence of thiourea. , 1993 .

[12]  S. Kagaya,et al.  Determination of Arsenic(III) and Arsenic(V) by Hydride Generation– Atomic Absorption Spectrometry Following a Rapid Coprecipitation Technique with Hafnium(IV) Hydroxide , 1992 .

[13]  H. Kawaguchi,et al.  Minimization of the amount of indium carrier in coprecipitation for the determination of cadmium by graphite-furnace atomic absorption spectrometry , 1992 .

[14]  R. Dabeka.  Graphite-furnace atomic absorption spectrometric determination of lead, cadmium, cobalt and nickel in infant formulas and evaporated milks after nitric-perchloric acid digestion and coprecipitation with ammonium pyrrolidine dithiocarbamate. , 1989, The Science of the total environment.

[15]  T. Rains,et al.  Electrothermal atomisation atomic absorption spectrometric determination of tin after coprecipitation with hafnium hydroxide , 1988 .

[16]  Natsuko Yamazaki,et al.  Flameless atomic-absorption spectrometric and differential-pulse polarographic determination of cadmium after coprecipitation with hafnium hydroxide. , 1986 .

[17]  V. Hudnik,et al.  The determination of trace metals in mineral waters , 1978 .

[18]  E. Boyle,et al.  Determination of copper, nickel, and cadmium in sea water by apdc chelate coprecipitation and flameless atomic absorption spectrometry , 1977 .