Koshy V J, Garg V N
Research Centre, Indian Petrochemicals Corporation Limited, P.O. Petrochemicals, Baroda-391 346, India.
Talanta. 1987 Nov;34(11):905-8. doi: 10.1016/0039-9140(87)80127-3.
A method is described for the determination of chloride in PtAl(2)O(3)/SiO(2) catalysts, based on its extraction with alkali followed by reaction with Hg(SCN)(2)Fe(3+) reagent and spectrophotometric measurement at 460 nm. Beer's law is obeyed in the concentration range 5-75 mug of chloride in 25 ml of aqueous solution. The molar absorptivity is 1.99 x 10(3) l.mole(-1).cm(-1). The rapid colour development, excellent reproducibility and absence of interference from the species most often present in the catalysts are the advantages of the method.
描述了一种测定PtAl(2)O(3)/SiO(2)催化剂中氯含量的方法，该方法基于用碱萃取氯，然后与Hg(SCN)(2)Fe(3+)试剂反应，并在460nm处进行分光光度测量。在25ml水溶液中氯含量为5-75μg的浓度范围内符合比尔定律。摩尔吸光系数为1.99×10(3) l.mole(-1).cm(-1)。该方法具有显色迅速、重现性好以及不受催化剂中最常见物种干扰的优点。
