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E-Journal of Chemistry
Volume 6 (2009), Issue 1, Pages 106-112

H-Point Standard Addition Method for Simultaneous Determination of Maneb and Zineb

P. P. Kaur and U. Gupta

Department of Chemistry, Punjabi University, Patiala-147002, Punjab, India

Received 30 May 2008; Accepted 1 July 2008

Copyright © 2009 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The H-point standard addition method (HPSAM) has been applied for simultaneous determination of maneb and zineb using 1-(2-pyridylazo)-2- naphthol (PAN) as a reagent. Both maneb and zineb form wine red colored complex with PAN at pH 9.2 which are soluble in Triton X-100. Zineb and maneb can be determined simultaneously in the range of 0.414-3.446 µg mL-1 and 0.663-3.316 µg mL-1 respectively with satisfactory accuracy and precision. The proposed method has successfully been applied for the simultaneous determination of maneb and zineb in several synthetic samples, spiked water samples and crops