Separation and determination of diastereomers of lambda-cyhalothrin by normal phase-liquid chromatography using a CN column.
A simple and rapid normal-phase liquid-chromatographic method for the separation and determination of diastereomers of lambda-cyhalothrin using a CN column and detection at UV-230 nm has been developed. This method has the advantage of totally resolving each of the diastereomers from impurities, such as meta-phenoxy benzaldehyde, cyhalothric acid and cyhalothric acid chloride, of technical and formulated materials, allowing one to monitor the low-temperature conversion of diastereomers of lambda-cyhalothrin for process development.
Rao
R Nageswara
RN
Analytical Chemistry Division, Indian Institute of Chemical Technology, Tarnaka, Hyderabad-500 007, India. rnrao@ins.iictnet.com
Shankaraiah
B
B
Sunder
M Shyam
MS