Please use this identifier to cite or link to this item: http://nopr.niscair.res.in/handle/123456789/57790
Title: Digital camera analysis of dichlorvos by phloroglucinol and quantitate with standard colour chart in environmental water matrices – an approach
Authors: Baskaran, Kamesh Viswanathan
Keywords: DDVP;Colour chart;Phloroglucinol;Semi-quantitative;Digital camera analysis
Issue Date: Jul-2021
Publisher: NIScPR-CSIR, India
Abstract: Dichlorvos (DDVP) analysis using visible spectrophotometer, gas chromatography-mass spectrometry and liquid chromatography mass spectrometry has been studied extensively. The major drawback of all the method is requirement of standardisation, expensive and maintenance nature of instrument involvement. Since, many governments has banned the use of DDVP, standardisation is quite challenging with single point standard method. In this study, using digital camera based colour analysis for DDVP is carried out to develop one-time multistandard colour chart. The analysis is carried out by alkaline degradation of DDVP to dichloroacetylaldehyde to react with phloroglucinol and producing distinct colour gradients from pale purple to dark brown. The colour chart is able to quantitate the limit of detection and limit of quantification of 6 μg/mL and 20 μg/mL, respectively. The study is further experimented with real-time ground water with non-spiked and spiked DDVP samples for pre-concentration effect. The 1:1 linear relation is found with absorbance based spectrophotometer detection and digital camera image analysis to quantify around ppb level. This shows the colour analysis by human naked eye judgement is possible at certain level as semi-quantitate by strategical approach. In this paper, we have used the colour chart based digital camera detection of DDVP, which will be a viable alternate approach for analysing the environment samples.
Page(s): 959-965
URI: http://nopr.niscair.res.in/handle/123456789/57790
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.60A(07) [July 2021]

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