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  • Title: [Highly sensitive spectrophotometric determination of trace amounts tin in water by Sn(IV)-XO-PVA system].
    Author: Sun HW, Liang SX, Li L, Zhang W.
    Journal: Guang Pu Xue Yu Guang Pu Fen Xi; 2003 Jun; 23(3):594-6. PubMed ID: 12953551.
    Abstract:
    A new spectrophotometric method for the determination of trace amount of tin (IV) has been developed based on the reaction of Sn (IV) with o-cresolphthalexon (XO), which forms a stable complex in the presence of polyvinyl alcohol (PVA). The complex exhibited a maximum absorbance at 544 nm. The molar absorption coefficient was 4.38 x 10(5) L.mol-1.cm-1. Recovery factor ranged from 97.4%-101.1%. Beers law was obeyed in the range of Sn 0.1-5 micrograms.(25 mL)-1. The complex was stable within 6 h. The suitable conditions for the reaction were investigated. The developed method has been applied to the determination of Sn (IV) in water samples. The result obtained is satisfactory.
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