Determination of Antimony in drinking waters by an inexpensive, reproducible hydride generator for atomic spectroscopy

✍ Scribed by Barbera, R. ;Farré, R. ;Romero, I.

• Book ID: 102215831
• Publisher: John Wiley and Sons
• Year: 1991
• Tongue: English
• Weight: 321 KB
• Volume: 35
• Category: Article
• ISSN: 0027-769X
• DOI: 10.1002/food.19910350103

✦ Synopsis

A method for determining antimony in drinking waters is described. In order to prevent a substantial error caused by the different oxidation states of antimony, Sb(V) is reduced to Sb(II1) with potassium iodide-ascorbic acid. Covalent hydride is generated with a home made device by adding NaBH,. The hydride is then atomized in a flame-heated silica tube and atomic absorption is measured spectrophotometrically. The optimal conditions for this determination are discussed and interference effects are described.

Results obtained by determining linearity range (0-200 ng), detection (LOD) and quantitation (LOQ) limits (LOD = 0.347 ng/ml, LOQ = 1.158 ng/ml), precision (instrumental CV 4.08 YO and method CV 7.74%) and accuracy performed by recovery assays (96. I %)show that the method is useful for antimony determination at the concentration usually present in drinking water.

Reaction vessel

Fig. I Antimony hydride generation vessel