Determination of cadmium by flame atomic absorption spectrometry after preconcentration on naphthalene–methyltrioctylammonium chloride adsorbent as tetraiodocadmate (II) ions

Abstract A sensitive and simple solid-phase preconcentration procedure for enrichment of cadmium prior to analysis by flame atomic absorption spectrometry (FAAS) is described. The method is based on the adsorption of cadmium as CdI 4 2− on naphthalene–methyltrioctylammonium chloride adsorbent, elution by nitric acid and subsequent determination by FAAS. The effect of pH, iodide concentration, sample flow rate, volume of the sample and diverse ions on the recovery of the analyte was investigated and optimum conditions were established. A preconcentration factor of 40 was achieved using the optimum conditions. The calibration graph was linear in the range 1–100 ng ml −1 cadmium in the initial solution. The detection limit based on the 3S b criterion was 0.6 ng ml −1 and the relative standard deviations (RSD) were 3.9 and 1.05% for 5 and 40 ng ml −1 , respectively ( n =8). The method was successfully applied to the determination of cadmium added to river, tap and Persian Gulf water samples.

[1]  A. Lásztity,et al.  Use of a new type of 8-hydroxyquinoline-5-sulphonic acid cellulose (sulphoxine cellulose) for the preconcentration of trace metals from highly mineralised water prior their GFAAS determination. , 1998, Talanta.

[2]  Jianhua Wang,et al.  Coupling sequential injection on-line preconcentration using a PTFE beads packed column to direct injection nebulization inductively coupled plasma mass spectrometry , 2002 .

[3]  M. F. Enríquez-Domínguez.  Determination of cadmium in mussels by flame atomic absorption spectrometry with preconcentration on a chelating resin in a flow injection system , 1998 .

[4]  E. Russeva,et al.  Co-precipitative pre-concentration with sodium diethyldithiocarbamate and ICP-AES determination of Se, Cu, Pb, Zn, Fe, Co, Ni, Mn, Cr and Cd in water. , 1998, Talanta.

[5]  M. Behpour,et al.  COLUMN PRECONCENTRATION OF ALUMINUM USING ERIOCHROME CYANINE R AND METHYLTRIOCTYLAMMONIUM CHLORIDE ADSORBENT SUPPORTED ON NAPHTHALENE WITH SUBSEQUENT SPECTROPHOTOMETRIC DETERMINATION , 1999 .

[6]  A. Türker,et al.  Determination of Cu, Zn, Fe, Ni and Cd by flame atomic absorption spectrophotometry after preconcentration by Escherichia coli immobilized on sepiolite. , 2000, Talanta.

[7]  S. Hill,et al.  Determination of trace metals in volatile organic solvents using inductively coupled plasma atomic emission spectrometry and inductively coupled plasma mass spectrometry , 1992 .

[8]  M. Soylak,et al.  Determination of trace metal ions by AAS in natural water samples after preconcentration of pyrocatechol violet complexes on an activated carbon column. , 2000, Talanta.

[9]  E. Carasek,et al.  A new method of microvolume back-extraction procedure for enrichment of Pb and Cd and determination by flame atomic absorption spectrometry. , 2002, Talanta.

[10]  K. Sugawara,et al.  The simple and rapid spectrophotometric determination of trace chromium(VI) after preconcentration as its colored complex on chitin. , 1998, Talanta.

[11]  Á. Maquieira,et al.  Use of Saccharomyces cerevisiae in flow injection atomic absorption spectrometry for trace metal preconcentration. , 1994, Analytical chemistry.

[12]  J. Salgado,et al.  Field preconcentration of cadmium from seawater by using a minicolumn packed with Amberlite XAD-4/4-(2-pyridylazo) resorcinol and its flow-injection-flame atomic absorption spectrometric determination at the ng L–1 Level , 2002, Analytical and bioanalytical chemistry.

[13]  Z. Alfassi,et al.  Determination of trace amounts of cadmium, cobalt, chromium, iron, molybdenum, nickel, selenium, titanium, vanadium and zinc in blood and milk by neutron activation analysis. , 1990, The Analyst.

[14]  Luis D. Martinez,et al.  On-line preconcentration/determination of cadmium in drinking water on activated carbon using 8-hydroxyquinoline in a flow injection system coupled to an inductively coupled plasma optical emission spectrometer , 2003 .

[15]  J. Pavón,et al.  Automatic on-line column preconcentration system for determination of cadmium by electrothermal atomic absorption spectrometry , 2001 .

[16]  A. Türker,et al.  Flame atomic absorption spectrometric determination of silver after preconcentration on Amberlite XAD-16 resin from thiocyanate solution. , 2000, Talanta.