Pipettes Articles

  • How Dirty Are You? Part 5…Micropipette Tips

    Pipettes are common tools for drawing and dispensing precise volumes in chemical, biological and medical labs. Thanks to the invention of micropipettes and other techniques, we don’t do mouth pipetting anymore. Positive displacement pipettes are particularly useful because the air gap in standard micropipettes are replaced by capillary pistons, which greatly improve the accuracy ...


    By Restek Corporation

  • TitraSip automated pipetting improves accuracy and precision over manual pipetting case study

    MANTECH INC. is a leading manufacturer of automated multi-parameter, titration, BOD and COD laboratory instruments. MANTECH developed the first automated titrator in the world to include automated pipetting capability. In our short history, there are already >1000 TitraSip’s in daily use in accredited laboratories around the globe. The software controlled TitraSip module has proven to ...


    By MANTECH

  • MIT community takes the Earth Day Challenge

    Take Action! Earn Points! Win Prizes! Written by Rachael Budowle, MIT Sustainability Program.You can read the original new in MIT NewsEarth Day has been reinvented at MIT. The Institute has a long history of Earth Day fairs, film series, colloquia, and other ...

  • TitraSip automated pipetting: justification over manual pipetting and analysis in beakers case study

    MANTECH INC. is a leading manufacturer of automated multi-parameter, titration, BOD and COD laboratory instruments. MANTECH developed the first automated titrator to include automated pipetting. The software controlled TitraSip module has proven to generate results that are accurate, precise and enforceable. Water quality is of paramount importance to ecosystems and human health and the TitraSip ...


    By MANTECH

  • Determination of brominated flame retardants in Jukskei River catchment area in Gauteng, South Africa

    Brominated flame retardants (BFRs) are considered to be environmental pollutants due to their toxicity, persistence and ubiquity in the environment. Little information is known about the presence of brominated flame retardants in South Africa's water systems. Therefore, this study examined and compared different extraction methods (liquid–liquid (LL) vs. solid phase (SP) for water, Soxhlet ...


    By IWA Publishing

  • Characterization of Polymer Carbon Sieves, Graphitized Polymer Carbons and Graphitized Carbon Blacks for Sample Preparation Applications

    The use of carbons in sample preparation techniques such as solid phase extraction (SPE) and air sampling has been ongoing for several decades. Recent advancements in sample preparation techniques have led to the use of carbons in micro-SPE (i.e., pipette tips packed with particles), solid phase microextraction (SPME) techniques and carbon coatings for both gas and liquid sample preparation ...


    By MilliporeSigma

  • Preparation of thiabendazole standards for use in applications of the benomyl/carbendazim rapid assay

    GENERAL COMMENTS: This procedure describes the preparation of thiabendazole (TBZ) standards used in applications of the Benomyl/Carbendazim RaPID Assay. Standard concentrations of 10, 50 and 250 ng/mL (ppb) TBZ and a control concentration of 100 ppb TBZ are prepared by making appropriate dilutions of a concentrated TBZ solution in the Benomyl/Carbendazim Sample Diluent. The standards and ...


  • Detection of parathion-methyl on gauze wipes

    MATRIX: Cotton gauze pad (wipe) ANALYTE: Parathion-methyl RANGE OF DETECTION: 0.08 mg per wipe (100 cm2) MATERIALS: EnviroGard Parathion Plate Kit (item #75000). SDI Wipe Extraction Kit. Protective gloves. WIPE PROCEDURE: Caution: Wear protective gloves for this procedure. Saturate a gauze ...


  • Detection of chlorpyrifos in formulations

    MATRIX: Formulations ANALYTE: Chlorpyrifos RANGE OF DETECTION: 0.5% to 1.5% MATERIALS: InQuest OP/Carbamates 25-Test Screening Kit (Item #A00122) Wash Solution B for Organophosphates (Item #A00126) Universal Range Extension Kit (Item #A00235) Eppendorf Adjustable Volume Pipette, 0.5 to 2.5 mL (Item #A00238) Glass ...


  • Detection of methomyl dislodgeable foliar residues from grape leaves

    MATRIX: Grape Leaf Surface ANALYTE: Methomyl RANGE OF DETECTION: Low range: 0.0025 mg/cm2 to 0.037 mg/cm2 (2.46 ng/cm2 to 37.0 ng/cm2), High range: 0.012 mg/cm2 to 0.185 mg/cm2 (12.3 ng/cm2 to 185 ng/cm2) MATERIALS: Methomyl RaPID AssayÒ Kit and Sample Diluent. RaPID Prepä DFR Wash. Equipment: 2.54 cm (1 ...


  • Detection of thiabendazole in grapefruit juice

    MATRIX: Grapefruit Juice ANALYTE: Thiabendazole (TBZ) RANGE OF DETECTION: 10 to 250 ppb MATERIALS: Benomyl/ Carbendazim RaPID AssayÒ Kit and Sample Diluent. TBZ Standards (0, 10, 50 and 250 ppb TBZ) prepared in Sample Diluent. Reagents: ethanol and ethyl acetate (pesticide grade), 2M ammonium chloride (53.5 g/L ...


  • Detection of chlorpyrifos on whole oats

    MATRIX: Whole grain oats ANALYTE: Chlorpyrifos RANGE OF DETECTION: 15 ppb to 204 ppb MATERIALS: Chlorpyrifos RaPID Assay and Chlorpyrifos Sample Diluent. RaPID Prepä Soil Collection Kit. Reagents: methanol (pesticide grade). Equipment: 13x100 mm glass test tubes; 5.0 mL serological pipet, precision pipet capable ...


  • Preparation of <25x or >100x dilutions with the rapid prep universal range extension kit

    GENERAL COMMENTS: This procedure describes how to prepare dilutions of less than 25x or greater than 100x using the appropriate RaPID AssaysÒ Sample Diluent and components of the RaPID PrepÔ Universal Range Extension Kit. Preparing dilutions of 25x to 100x are already described in the package insert of the Universal Range Extension Kit. Serial dilutions using components of the ...


  • Detection of PCB on gauze wipes

    MATRIX: Cotton gauze pad (wipe) ANALYTE: PCB RANGE OF DETECTION: Low range: 5 to 100 mg per wipe, High range: 25 to 500 mg per wipe MATERIALS: PCB RaPID AssayÒ Kit and Sample Diluent. RaPID Prepä PCB Sample Extraction Kit. Reagents: hexane (pesticide grade). Equipment: 3 inch x 3 inch cotton gauze pads ...


  • Detection of atrazine in raw sugarcane juice

    MATRIX: Raw juice from sugarcane ANALYTE: Atrazine RANGE OF DETECTION: 50 ppb to 2.5 ppm MATERIALS: Atrazine RaPID Assay kit and Sample Diluent Equipment: micropipets, 100 and 500 μL; 13 x 100 mm glass test tubes, test tube rack. SAMPLE PREPARATION: As part of the sugar ...


  • Detection of procymidone in grapes

    MATRIX: Grapes ANALYTE: Procymidone RANGE OF DETECTION: 0.4 to 20 ppm MATERIALS: Procymidone RaPID Assay Kit and Sample Diluent Reagents: acetone (pesticide grade), sodium chloride. Equipment: blender with acetone resistant container cup, 50 mL conical tubes, 15 mL polypropylene centrifuge tubes with screw caps, ...


  • Detection of atrazine in corn oil

    MATRIX: Corn Oil ANALYTE: Atrazine RANGE OF DETECTION: 10 to 500 ppb MATERIALS: Atrazine RaPID Assay, Kit and Sample Diluent. Reagents: acetonitrile (pesticide grade). Equipment: 15 mL polypropylene tubes with screw caps, 15 mL polypropylene centrifuge tubes, serological pipets, test tube rack and pan balance. ...


  • Atrazine accuracy confirmation using EPA certified reference standard

    ANALYTE: Atrazine RANGE OF EVALUATION: 0.5 to 4.0 ppb MATERIALS: Atrazine RaPID Assay Kit and Sample Diluent (cat. no. A00051) Reagents: U.S. EPA Reference Standard for atrazine with certified concentration of 1000 μg/mL, in methanol ( NSI Environmental Solutions, Research Triangle Park, NC). Equipment: precision micropipets: 100 ...


  • Detection of captan in grapes

    MATRIX: Grapes ANALYTE: Captan RANGE OF DETECTION: 8 to 300 ppm MATERIALS: Captan RaPID AssayÒ kit and Sample Diluent Food Prep Kit Reagents: acetone (pesticide grade) Equipment: homogenizer or blender with acetone resistant container cup, 50 mL polypropylene conical tubes, 13 x 100 mm glass test tubes, ...


  • 2,4-D accuracy confirmation using EPA certified reference standard

    ANALYTE: 2,4-D RANGE OF EVALUATION: to 40 ppb MATERIALS: 2,4-D RaPID Assay Kit and Sample Diluent (cat. no. A00079) Reagents: U.S. EPA Reference Standard for 2,4-D with certified concentration of 5000 μg/mL, in acetonitrile (N SI Environmental Solutions, Research Triangle Park,N C). Equipment: 100 μL ...


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