carbamate column Articles

  • 2.1 mm ID micro carbamates column ideal for LC-MS confirmation

    Post-column derivatization of carbamates with hydroxide and OPA is the method of choice for the detection of carbamates because of its high selectivity and high sensitivity (US EPA 531.1 & AOAC 985.23).  To confirm the finding of carbamates in the tested samples, there are various possibilitites: To confirm the finding of carbamates in the tested samples, there are various ...

  • 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, ...

  • 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.

  • 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 ...

  • 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 ...

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