Journal of Planar Chromatography 29 (2016) 3 1 1 Introduction Carbaryl (1-naphthyl-N-methylcarbamate; Figure 1) belongs to a family of chemicals that kill or control insects, known as carbamates. These insecticides are widely used against a broad           -           -    - not be easily located, possibly because of biological impurities. Figure 1 The chemical structure of carbaryl. U.K. Kulkarni and K.V. Kulkarni, Directorate of Forensic Science Laboratories, - -  E-mail:   -  a mixture of sodium bromide and copper chloride for high-per-       - ane and ethyl acetate (9:1). 2 Experimental 2.1 Chemicals and Reagents  used throughout the analysis. Ten-percent ( v/v) sodium hydrox-  in 100 mL of distilled water.    - baryl (1 mg mL  ) was prepared in ethanol. Similarly, all the standards (profenofos, thiodan, cypermethrin, began, carbo-   for the extraction of carbaryl. 2.2 Extraction Procedure  - ple contains water, then diatomaceous earth is added to absorb the water contents and get a solid and semisolid sample for ex-                                -           pieces along with diatomaceous earth and transferred into the extraction cell. The extract was collected in a clean collection  and Detection of Carbaryl in Biological Materials Ulka K. Kulkarni, Krishna V. Kulkarni, R.K. Pardeshi, and Dhananjay V. Mane* Key Words: Insecticide High-performance thin-layer chromatography Journal of Planar Chromatography 29 (2016) 3, 1–2 DOI: 10.1556/1006.2016.29.3.? 0933-4173/$ 20.00 © Akadémiai Kiadó, Budapest