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Molybdate sensor based on 5,10,15,20-tetraphenylporphyrinatocobalt complex in a PVC matrix by Vinod K. Gupta; Ajay K. Jain; Lok P. Singh; Upendra Khurana; Pankaj Kumar is a Chemistry article available to read on EtoBox.

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Poly(vinyl chloride) (PVC) based membranes of 5,10,15,20-tetraphenylporphyrinatocobalt, (I), incorporating dibutyl phthalate (DBP) in the composition 9:55:36 (I:PVC:DBP) responds to molybdate MoO 2À 4 over the concentration range 7.610 À6 ±1.010 À1 mol l À1 , pH between 4.9 and 11.3, with a Nernstian slope and a fast response time of 15 s. The membrane shows excellent selectivity towards MoO 2À 4 ions over a number of other anions and exhibits stable response for more than four months. The sensor can be used in non-aqueous medium with no signi®cant change in the value of slope or working concentration range for the estimation of MoO 2À 4 in solutions having upto 25% (v/v) non-aqueous fraction. It was applied for the estimation of molybdenum as molybdate in a sample of molybdenite, a low grade ore.

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Author

Vinod K. Gupta; Ajay K. Jain; Lok P. Singh; Upendra Khurana; Pankaj Kumar

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0003-2670)

Published

1999

Language

EN

Field

Chemistry (Physical Sciences)