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Flow-injection determination of traces of formaldehyde by the Brilliant Green—sulphite reaction with spectrophotometric detection

✍ Scribed by A. Safavi; A.A. Ensafi

Publisher
Elsevier Science
Year
1991
Tongue
English
Weight
554 KB
Volume
252
Category
Article
ISSN
0003-2670

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✦ Synopsis

A flow-injection system is proposed for the rapid determination of trace amounts of formaldehyde based on its inhibition of the Brilliant Green-suiphite reaction at pI1 7. Formaldehyde in the range 40-3000 ng ml-' can be determined at a rate of 35 f 5 samples h -I. The limit of detection was 20 ng ml -'_ The relative standard deviation for the determination of 1 ;rg ml-' formaldehyde was 0.2%. The method was applied lo the determination of formaldehyde in melamine-formaldehyde resin and chemical industria; waste water.

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