Spectrophotometric Method for Determination of Paraquat in Food and Biological Samples
1997 ◽
Vol 80
(2)
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pp. 388-391
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Keyword(s):
Abstract A sensitive spectrophotometric method was developed for determination of paraquat, a widely used herbicide. Paraquat was reduced with glucose in an alkaline medium, and the blue radical ion obtained was measured at 600 nm. Beer’s law was obeyed at 0.1–1.2 ppm paraquat. The molar absorptivity was 1.26 × 105 L mol-1 cm-1. The standard deviation and relative standard deviation were ± 0.007 and 2.0%, respectively, for 5 μg paraquat/10 mL analyzed over 7 days. The method was free from interference by other commonly used pesticides and metal ions. The method may be used to the determine paraquat in plants, fruits, grains, water, blood, and urine.
1993 ◽
Vol 76
(3)
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pp. 601-603
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2008 ◽
Vol 27
(2)
◽
pp. 149
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2013 ◽
Vol 10
(3)
◽
pp. 1005-1013
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2004 ◽
Vol 87
(4)
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pp. 847-851
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2012 ◽
Vol 554-556
◽
pp. 926-933
1970 ◽
Vol 7
(5)
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pp. 25-29