SYMPOSIA PAPER Published: 30 November 2016
STP159520150083

Improved Analytical Method Study of the Determination of Lambda-Cyhalothrin as Premix in Water-Based, Environmentally Friendly Formulations

Source

A gas chromatograph (GC) analytical method for the technical determination of lambda-cyhalothrin in WP, EC, and UL formulations was published as lambda-cyhalothrin 463 of the Collaborative International Pesticides Analytical Council (CIPAC) Handbook E. The method for determination of lambda-cyhalothrin in capsule suspension formulations is published in the CIPAC Handbook K. The published GC methods for the determination of lambda-cyhalothrin, especially as a premix combined with other materials containing nitrogen, show a higher isomerization of lambda-cyhalothrin during the analysis, thus making the method unsuitable. Therefore, we introduce a high-performance liquid chromatography (HPLC) method that has been found to be more appropriate for the determination of lambda-cyhalothrin in these mixtures as well as in water-based formulations. This method provides good linearity (R2 > 0.999) and precision (relative standard deviation <2 %). This HPLC method does not favor any isomerization of lambda-cyhalothrin during the analysis; it is very simple and easy to apply in a technical grade and in formulations.

Author Information

Chen, Shao'e
Jiangsu Rotam Chemistry Co. Ltd, Jiangsu, CN
Zhu, Zhen
Jiangsu Rotam Chemistry Co. Ltd, Jiangsu, CN
Ni, Dejian
Jiangsu Rotam Chemistry Co. Ltd, Jiangsu, CN
Wang, Lidong
Jiangsu Rotam Chemistry Co. Ltd, Jiangsu, CN
Gao, Zhongwen
Jiangsu Rotam Chemistry Co. Ltd, Jiangsu, CN
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Details
Developed by Committee: E35
Pages: 102–112
DOI: 10.1520/STP159520150083
ISBN-EB: 978-0-8031-7636-2
ISBN-13: 978-0-8031-7635-5