sodium analyzer Articles

  • 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 ...


  • Kinetic and equilibrium profile of the adsorptive removal of Acid Red 17 dye by surfactant-modified fuller's earth

    In the present study, fuller's earth (FE) was modified with sodium dodecyl sulfate for removal of Acid Red 17 (AR 17) dye from aqueous solutions. The surfactant-modified FE and FE were characterized by a Fourier transform infrared spectrometer, thermogravimetric analyzer and scanning electron microscope. Batch adsorption experiments were carried out as a function of contact time, pH, initial ...


    By IWA Publishing

  • Introduction to Ion Exchange Part 1

    IMPURITIES IN WATERWater is often referred to as the 'universal solvent' as it will dissolve small amounts of everything it touches. Water collects or dissolves a variety of mineral salts, organic compounds and suspended solids as it flows over the earth's surface and through the ground. These impurities make water undesirable for use in many applications. It is, therefore, important to ...


  • Removal of dissolved organic matter (DOM) from water with activated carbon and effective microorganisms

    Humic substances (HS) cause problems in water purification because of disinfection by-product (DBP) formation during chlorination. The efficiency of activated carbon (AC) adsorption as a method in drinking water treatment has been investigated in removing HS at different pH values (pH = 5; 6; 7; 8) in static equilibrium experiments. The degradation of HS was studied with an EM (effective ...


    By IWA Publishing

  • Waterborne exposure to microcystin‐lr causes thyroid hormone metabolism disturbances in juvenile chinese rare minnow (Gobiocypris rarus)

    Microcystin‐LR (MC‐LR) has the potential to disturb thyroid hormone (TH) homeostasis, but little is known of the underlying mechanisms of MC‐LR in fish. In the present study, juvenile Chinese rare minnows (Gobiocypris rarus) were exposed to various concentrations of MC‐LR (0, 50, 100, and 500 μg/L) for 7 d. The whole‐body content of THs, the histology of thyroid follicle epithelial cells, the ...


    By John Wiley & Sons, Ltd.

  • Amino acid analysis matrix independent analysis of free amino acids

    Pickering Laboratories specializes in manufacturing of cationexchange columns and eluants for amino acid analysis. No other techniques have been shown to match the reproducibility and sensitivity of this post-column methodology. Advantages of this method, such as absence of matrix interferences, are especially important in analysis of native samples. Pickering provides several options for the ...


    By Pickering Laboratories, Inc.

  • Detection of chlorothalonil in celery

    MATRIX: Celery ANALYTE: Chlorothalonil RANGE OF DETECTION: 20 ppb to 1 ppm MATERIALS: Chlorothalonil RaPID AssayÒ Kit and Sample Diluent Reagents: acetone (pesticide grade), sodium chloride. Equipment: 250 mL polypropylene bottles, 15 mL polypropylene tubes, 13 x 100 mm glass test tubes, 50 mL precision pipet, ...


  • Kinetics and equilibrium adsorption study of p-nitrophenol onto activated carbon derived from walnut peel

    An original activated carbon prepared from walnut peel, which was activated by zinc chloride, was modified with ammonium hydroxide or sodium hydroxide in order to contrast the adsorption property of the three different activated carbons. The experiment used a static adsorption test for p-nitrophenol. The effects of parameters such as initial concentration, contact time and pH value on amount ...


    By IWA Publishing

  • 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, ...


  • Optimization analysis of separation conditions of washed water containing a lead complex and characterization of the precipitation products

    Presently, the large amount of industrial leaded wastewater creates a great challenge to both environmental governance and wastewater recycling. Lead complexes in washed water must be removed mostly before the washed water can be recycled. This paper reports the mechanism and factors of removing Pb complexes in simulated washed water by the sulfide precipitation method. The reaction time, ...


    By IWA Publishing

  • Detection of carbendazim in celery

    MATRIX: Celery ANALYTE: Carbendazim, a metabolite of benomyl RANGE OF DETECTION: 25 to 500 ppb MATERIALS: Benomyl/Carbendazim RaPID AssayÒ kit and Sample Diluent Reagents: acetone (pesticide grade), sodium chloride. Equipment: blender with acetone resistant container cup, 50 mL polypropylene conical tubes, 15 ...


  • The removal of typical pollutants in secondary effluent by the combined process of powdered activated carbon–ultrafiltration

    This paper focused on the effects of powdered activated carbon (PAC) dosage on ultrafiltration (UF) membrane flux caused by natural organic matter (NOM). Three model foulants, humic acid (HA), bovine serum albumin (BSA) and sodium alginate (SA), were adopted to represent different NOM fractions in secondary effluent treated by the combined process of PAC-UF. Moreover, the membrane fouling ...


    By IWA Publishing

  • Metal Status of Nairobi River Waters and Their Bioaccumulation in Labeo Cylindricus

    Abstract  This study focused on the analysis of metals in water and fish from Nairobi River. Water from Kikuyu, Kawangware, Chiromo, Eastleigh, Njiru and Fourteen Falls along the Nairobi River was analyzed for the presence of metals. Most of the metal levels in water were below the critical limit of World Health Organization and Kenya Bureau of Standards except for lead, chromium, iron and ...


  • Detection of pentachlorophenol in soil

    MATRIX: Soil ANALYTES: Pentachlorophenol (PCP) RANGE OF DETECTION: 100 ppb to 10 ppm MATERIALS: Pentachlorophenol RaPID AssayÒ kit and Sample Diluent Reagents: methanol (reagent grade), sodium hydroxide (ACS grade), distilled or deionized water. Equipment: reciprocating shaker, plastic bottles (polypropylene or ...


  • Detection of carbendazim in soil

    MATRIX: Soil ANALYTE: Carbendazim, a metabolite of benomyl RANGE OF DETECTION: 37.5 to 750 ppb MATERIALS: Benomyl/Carbendazim RaPID Assay kit and Sample Diluent Reagents: methanol (pesticide grade), sodium hydroxide (ACS grade), distilled or deionized water. Equipment: reciprocating shaker, plastic bottles ...


  • Evaporator Limits Boron to 5 PPM at award-winning chemical plant

    Problem: The biggest challenge confronting Rohm & Haas Corp. in building a wastewater plant for its chemical facility in Elma, Wash., was meeting Washington State Dept. of Ecology limitations on boron of 5 ppm. The Elma plant manufactures sodium borohydride, a versatile chemical used in a variety of applications ranging from the generation of sodium hydrosulfite for reductive bleaching of ...


    By Oil Skimmers, Inc.

  • Surface modified polythiophene nanocomposite using HPC and DBSNa for heavy metal ion removal

    In the present work, surface modified nanocomposite adsorbents polythiophene (PTh)/rice husk ash (RHA) have successfully been synthesized in the presence of hydroxyl propyl cellulose (HPC) and sodium dodecyl benzene sulfonate (DBSNa) as surfactants. The synthesized nanoparticles were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and Fourier ...


    By IWA Publishing

  • Effects of soil solution`s constituents on proton NMR relaxometry of soil samples

    Proton nuclear magnetic resonance (1H NMR) relaxometry has been used to analyze pore size distributions of wet porous samples. To make this method applicable to soil samples, knowledge about contribution from the soil solution to the total proton relaxation is needed. We extracted soil solutions from nine soil samples and determined transverse proton relaxation rates, the concentration of Fe, Mn, ...

  • Increasing efficiency and safety of aluminium smelters – Case Study

    Energy consumption in aluminium smelters The basis for all modern primary aluminium smelting plants is the same: Aluminium oxide (Alumina) is dissolved in an electrolytic bath of molten cryolite (sodium aluminium fluoride) within a large carbon or graphite lined steel container known as a "pot". An electric current is passed through the electrolyte at low voltage, but very high ...

  • Chemical characterization and preliminary source contribution of fine particulate matter in the Mexicali/Imperial valley border area

    ABSTRACTThe airshed shared by the Valley of Mexicali in Mexico and Imperial Valley in the United States frequently experiences high levels of particulate matter (PM) less than 10 #1;m (PM10). However, very little information exists on the concentration  and composition of fine PM (PM #2;2.5 #1;m, or PM2.5) in the region, particularly on the Mexican side of the border. This paper  ...

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