A New Spectrophotometric Method for the Determination of Maneb in Commercial Formulations |
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Authors: | Ashok K Malik Werner Faubel Jyoti Kapoor Usha Gupta Avasarala LJ Rao |
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Institution: | 1. Foreschungeszentrum Karlsruhe , IFIA;2. Postfach 3640, 76021, Karlsruhe, Germany;3. Department of Chemistry , Punjabi University , Patiala, Punjab, India |
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Abstract: | Abstract A new rapid, selective and sensitive method has been developed for the determination of maneb using pyrocatechol-violet(PV) as chelating reagent in the pH range of 7.5–11.0 in the presence of CTAB producing a complex which shows maximum absorption at 640 nm. Working range of the method is 0.2–3.0 μg ml?1 maneb (manganese ethylenebisdithiocarbamate). The molar absorptivity of the color system is 79600 1 mol?1 cm?1 and Sandell's sensitivity is 0.0033 μg cm?2. The reproducibility of the method has been checked by the 10 replicate analysis of 15 μg of maneb in 10 ml of solution. The method is quite sensitive and has been applied for the determination of maneb in various commercial samples, crops, grains and synthetic samples. |
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Keywords: | Maneb pyrocatechol violet cetyltrimethyl ammonium bromide sensitizers surfactants |
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