Extraction-chromatographic determination of sulfonated azo dyes in aqueous solutions

Korenman, Ya. I.; Sannikova, Natalia; Sukhanov, P. T.; Kolesnik, A. V.

doi:10.1134/s1061934810050059

Cited by 5 publications

(2 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, no secondary or tertiary amines or primary amine groups attached directly to rings or amides have been discovered to give the ninhydrin reaction under the conditions used. Primary aliphatic amines rapidly re act with ninhydrin but methylamine reaction with ninhydrin is slow [5] Therefore, the conditions were optimized for ninhydrin methylamine complex. Nin hydrin methylamine complex had blue purple color with maximum absorbance at 570 nm.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Spectrophotometric determination of methylamine moiety containing pesticides using ninhydrine reagent

2012

View full text Add to dashboard Cite

A spectrophotometric method has been proposed for the determination of pesticides containing methylamine moiety. These pesticides afforded methylamine upon alkaline hydrolysis, which was subse quently reacted with ninhydrin in the presence of pyridine. The absorbance of the resulting blue purple prod uct was measured spectrophotometrically at 570 nm. The Beer's law showed a linear relationship between absorbance and concentration of the pesticide in the range 0.04-5.0 µg/mL. The limit of detection and limit of quantification were 0.012 and 0.02 µg/mL, respectively. The repeatability was 0.22 expressed as RSD. The performance of this newly developed method was compared with the established spectrophotometric meth ods for the determination of these pesticides. The method has been successfully applied to the evaluation of these pesticides in commercial pesticide formulation and to the determination of monocrotophos in fruit samples.

show abstract

Section: Resultsmentioning

confidence: 99%

“…In addition, the newly developed groups of pesticides are each time 1 The article is published in the original. more polar and/or thermodegradable and they should be incorporated into the existing Multiresidue meth ods [5,6].…”

mentioning

confidence: 99%