carbamate analysis Articles

  • ChlorAC Buffer

    Introduction Trace analysis of carbamate insecticide residues in water is a routine requirement in the U.S. Since several of the common carbamates — Carbaryl, Oxamyl, Hydroxycarbofuran — are labile in water due to oxidation or hydrolysis, the samples and standards must be preserved in order to obtain valid results. USEPA Method 531.1 specifies pH adjustment, ...


    By Pickering Laboratories, Inc.

  • Co‐extracted dissolved organic carbon has a suppressive effect on the acetylcholinesterase inhibition assay

    The acetylcholinesterase (AChE) inhibition assay is frequently applied to detect organophosphates and carbamate pesticides in different water types, including dissolved organic carbon (DOC) rich wastewater and surface water. The aim of the present study was to quantify the effect of co‐extracted DOC from different water samples on the commonly used enzyme based AChE inhibition assay. ...


    By John Wiley & Sons, Ltd.

  • Post-Column LC analysis of 23 N-methyl carbamates an expanded method using water/acetonitrile or water/methanol gradients

    There are a number of carbamate pesticide compounds employed worldwide which are not included in the 10 compounds mandated by USEPA Method 531.1 and AOAC Protocol 29.A05. This Application Note describes methods for separating as many as 23 compounds, using a Pickering C8, 5µm silica, column with either Water/Acetonitrile or Water/Methanol gradients. Instruments, post-column derivatization ...


    By Pickering Laboratories, Inc.

  • Analysis of US EPA Method 632 Carbamate and Urea Pesticides Using Ascentis™ C18

    US EPA Method 632 specifies a procedure for the determination of carbamate and urea pesticides in municipal and industrial wastewaters. The suitability of the Ascentis C18 for the separation of the nineteen analytes specified in the method is demonstrated. An Ascentis C18, 25 cm x 4.6 mm I.D., 5 μm particles was used to acheive separation of all compounds, under gradient conditions.  All ...


    By MilliporeSigma

  • Expanded HPLC Method for N-Methyl Carbamates post-column analysis of pesticides in food and potable water samples

    Carbamate pesticides are widely used around the world to protect crops. In addition, they are used as biocides for industrial or other applications and in household products. Though carbamates are biodegradable compounds and bioaccumulation usually happens only to a low extend it is important to monitor produce to make sure enough time has elapsed between harvest and applying pesticides. Also, ...


    By Pickering Laboratories, Inc.

  • Solid Phase Extraction of Pesticides from Fruits and Vegetables, for Analysis by GC or HPLC

    Recovery rates for polar analytes, including carbamate and thiourea pesticides, are higher and less variable with ENVI-Carb carbon-based solid phase extraction tubes than with C8- or C18- silica-based tubes. Independent investigators found ENVI-Carb tubes to be an effective part of sample cleanup for more than 200 organochlorine, organophosphorus, nitrogen-containing, and carbamate pesticides, ...


    By MilliporeSigma

  • o-Phthalaldehyde Reagent

    Introduction Primary amines form highly fluorescent adducts when reacted with o-Phthalaldehyde (OPA) and a mercaptan under basic conditions. At a pH>9 and ambient temperature, reaction is generally complete within 30 seconds. The products of this reaction, 1-alkyl-2-alkylthio-substituted isoindoles, exhibit optimal excitation at 330 nm and maximal emission at 465 nm. The reagents ...


    By Pickering Laboratories, Inc.

  • Pinnacle PCX Carbamate Testing at Nebraska Health

    Beta Site Evaluation of the EPA Carbamate in Drinking Water Method 531.1 with Pickering Laboratories Pinnacle PCX Integrated LC/Post-Column Derivatization Instrument. The Nebraska DHHS Public Health Environmental Laboratory conducts environmental testing for the state of Nebraska. It employs mandated U.S. Environmental Protection Agency (EPA) methods for the determination of regulated substances ...


    By Pickering Laboratories, Inc.

Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you