TY - JOUR A2 - Flechsig, Gerd-Uwe AU - Kataria, Ramesh AU - Sharma, Harish Kumar PY - 2014 DA - 2014/08/14 TI - A Rapid Extractive Spectrophotometric Method for the Determination of Tin with 6-Chloro-3-hydroxy-2-(2′-thienyl)-4-oxo-4H-1-benzopyran SP - 750973 VL - 2014 AB - An extractive spectrophotometric method for the determination of the trace amounts of tin has been carried out by employing 6-chloro-3-hydroxy-2-(2′-thienyl)-4-oxo-4H-1-benzopyran (in acetone) (CHTB) for the complexation of the metal ion in HCl medium. The colored species thus produced is quantitatively extracted into dichloromethane and shows the maximum absorbance at 432–437 nm. The method obeys Beer’s law in the range 0.0–1.3 μg mL−1 of tin with molar absorptivity and Sandell’s sensitivity of 5.81 × 10 4  L mol−1 cm−1 and 0.0020 μg Sn cm−2, respectively, at 435 nm. The method is highly selective and free from the interference of a large number of elements including platinum metals. The ratio of metal to ligand in the extracted species is 1 : 2. Utilizing this method, the analysis of various synthetic and technical samples including gun metal and tin can have been carried out satisfactorily. SN - 2356-6612 UR - https://doi.org/10.1155/2014/750973 DO - 10.1155/2014/750973 JF - Advances in Chemistry PB - Hindawi Publishing Corporation KW - ER -