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Khairatul Azmah Mohamed, . and Ngan Chai Keong, . and Ismail Sahid, . Adsorption and leaching studies of molinate carbofuran and propiconazole in Muda agricultural soils. pp. 127-136. ISSN 1394-9829
Khairatul Azmah Mohamed, . and Ngan Chai Keong, . and Mohammad Shahid Shahrun, . Determination of proposed maximum residue limit of cypermethrin in starfruit (Averrhoa carambola). pp. 99-106. ISSN 1394-9829
Ngan Chai Keong, . and Khairatul Azmah Mohamed, . and Ismail bin Sahid, . Determination of sample processing uncertainty in bifenthrin residue analysis in carambola and mango. pp. 213-227. ISSN 1394-9829
Mohammad Shahid Shahrun, . and Ngan Chai Keong, . and Khairatul Azmah Mohamed, . Evaluation of selected analyte protectant to improve performance of gas chromatographic analysis of pesticide residues. pp. 265-270. ISSN 1394-9829
Khairatul Azmah Mohamed, . and Ngan Chai Keong, . and Mohammad Shahid Shahrun, . and Ismail Sahid, . Validation of a multi-residue analytical method for pesticide residue analysis in fruits. pp. 119-126. ISSN 1394-9829
Ngan Chai Keong, . and Khairatul Azmah Mohamed, . and Mohammad Shahid Shahrun, . and Ismail Sahid, . Variation of cypermethrin residue levels in selected tropical fruit samples within and among field trials. pp. 191-198. ISSN 1394-9829
Khairatul Azmah Mohamed, . and Ngan Chai Keong, . (2011) Persistency and mobility of paraquat in the Malaysian oil palm agrosystem. In: Paraquat: asset or liability: a study initiated by the Malaysian Palm Oil Board. Malaysian Palm Oil Board, Bangi Selangor Malaysia, pp. 224-238. ISBN 9.7896796118e+12
