sampling container Articles
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Preliminary investigations on recovery of zircon from alluvial pebbles
Owing to high demand of zircon, the exploitation of the sand deposits and recovery of zircon from such alternate sources is a priority at present. In this context, investigations were carried out on the recovery of zircon from river pebbles by gravity spirals and tables. The study revealed that the Run of Mine (ROM) sample contains 0.35% by weight Total Heavy Minerals (THMs) with 0.03% ZrO2. The ...
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Life cycle of profitability among Swedish micro firms
The purpose of this paper is to examine the profitability life cycle among Swedish micro firms. The study sample contains 22,710 micro firms across six industries for which complete financial information is available, giving a total of 68,130 observations. The results of the empirical study indicate that the firm profitability changes systematically over its life cycle stages. The profitability ...
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Effects of the chemical characteristics and concentration of inorganic suspended solids on nitrification in freshwater
The effect of inorganic suspended solids (ISS) on nitrification in freshwater samples has been described inconsistently and remains unclear. This study therefore investigated the effects of the chemical characteristics and concentration of ISS on the nitrification rate by focusing on Nitrosomonas europaea and Nitrobacter winogradskyi as the two most dominant nitrification species in ...
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The naturally occurring carcinogen ptaquiloside (PTA) is present in groundwater below bracken vegetation
The present study demonstrates unequivocally the presence of the natural carcinogen ptaquiloside and its transformation product pterosin B in groundwater and surface water. Groundwater concentrations up to 0.23 nmol/L (92 ng/L) ptaquiloside and up to 2.2 nmol/L (0.47 µg/L) pterosin B were found. Five of 21 groundwater samples contained ptaquiloside exceeding the estimated threshold for ...
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Determination of PBDEs in Sediment Samples using Pressurized Solvent Extraction and Automated Soxhlet Extraction
The efficiency of pressurized solvent extraction (PSE) was investigated by comparing PSE with automated Soxhlet extraction. Sediment samples containing polybrominated diphenylethers (PBDEs) were processed in the SpeedExtractor E-914 for PSE and the Extraction System B-811 for automated Soxhlet extraction. Quantification of PBDEs was performed by GC-MS. This study shows that both techniques are ...
By BUCHI
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Measuring TOC in Brine Solutions
In the chlor-alkali and electrolysis industries, as well as many others, there is a need to analyze for TOC in samples containing high salt concentrations. These samples can range from sea water, which is typically 3% salt, up to brine solutions containing 28% salt. Shimadzu’s TOC-L with the high salt kit (P/N 638-93176-01 for N model & P/N 638-93176-02 for H model) is well suited for ...
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Detection of Clostridium botulinum type C in an aquatic area a year after an outbreak of botulism in waterfowl using conventional and molecular methods
A year after an outbreak of botulism in waterfowl, the presence of the causative agent of the disease, Clostridium botulinum type C, was investigated, using bioassay and polymerase chain reaction (PCR). Eighty two mud samples collected at different locations in the Skocjanski zatok nature reserve were investigated. Mouse bioassay revealed that 38 (46.4%) samples contained C. botulinum type C ...
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Distribution of polycyclic aromatic hydrocarbons in coke plant wastewater
The subject of examinations presented in this paper is the distribution of polycyclic aromatic hydrocarbons (PAHs) between solid and liquid phases in samples of raw wastewater and wastewater after treatment. The content of 16 PAHs according to the US EPA was determined in the samples of coke plant wastewater from the Zdzieszowice Coke Plant, Poland. The samples contained raw wastewater, ...
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Die Casting
A sample of wastewater was received from firm in the south central region of the US. The client could not get sufficient flocculation, despite using 10 lbs. of another dry flocculating material. The sample had an initial pH of 6.5. The sample contained glycol, mineral oil emulsion, wax polymers and soap for cleaning the floor. The sample was flocculated with Floccin K. The material formed a ...
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Purge Trap for GC Analyses of Volatile Aromatic (BTEX) Compounds in Soils and Sediments
The BTEXTRAP purge trap was designed specifically for monitoring benzene, toluene, ethylbenzene, and the xylene isomers (BTEX compounds). The trap allows large amounts of methanol (used in the US EPA Method 5030 procedure for preparing soil and sediment samples) to pass through the adsorbent beds while retaining the analytes of interest. In evaluations of trap performance, relative analyte ...
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More durable or more vulnerable? - Effect of nanoparticles on long-term performance of polymeric nanocomposites during UV exposure
ZnO nanoparticle is being used as an inorganic UV absorber for polymers. However, the mechanism of how ZnO nanoparticles influence the photo degradation of polymersis is not well understood. This study has investigated the role of ZnO nanoparticles in the long-term performance of a polyurethane (PU) nanocomposite subject to UV radiation. PU samples containing different levels of ZnO nanoparticles ...
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Map of the Month – Single-Wall Carbon Nanotubes
Welcome to Edinburgh Instruments monthly blog celebrating our work in Raman, Photoluminescence, and Fluorescence Lifetime Imaging. Every month we will highlight our pick for Map of the Month to show how our spectrometers can be used to reveal all the hidden secrets in your samples.AugustSingle-wall carbon nanotubes (SWCNTs) have unique electrical, thermal, mechanical, and optical properties which ...
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A comparative study of culture-independent, library-independent genotypic methods of fecal source tracking
Untitled Document Culture-independent fecal source tracking methods have many potential advantages over library-dependent, isolate-culture methods, but they have been subjected to limited testing. The purpose of this study was to compare culture-independent, library-independent methods of fecal source tracking. Five laboratories analysed identical sets of aqueous samples that ...
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Detection of Bacillus anthracis spores in postal and environmental samples in cases of suspected bioterrorism
From October 2001 to the end of 2004, a series of postal samples containing material suspected of containing Bacillus anthracis spores were examined. Environmental samples from dwelling places of some addressees and laboratory areas, including equipment, were also examined. Classical culture methods for isolation and identification were slightly modified and conformed to environmental samples. ...
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The removal of color and COD from wastewater containing water base color by coagulation process
Abstract: In this study acrylic water base color was removed from synthetic wastewater using coagulation process. Experiments were conducted on the sample containing 100 mg/L and 400 mg/L of acrylic water base color. Destruction of color by means of coagulation/flocculation techniques using ferrous sulfate, alum, lime and polyelectrolyte (cationic, anionic and non ionic).The study was performed ...
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Map of the Month - January
Welcome to Edinburgh Instruments monthly blog celebrating our work in Raman, Photoluminescence, and Fluorescence Lifetime Imaging. Every month we will highlight our pick for Map of the Month to show how our spectrometers can be used to reveal all the hidden secrets in your samples.There are 3 main bands of interest in the Raman spectra of graphene, the G-band, the D-band, and the 2D-band. These ...
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Colorado Produced Water
Colorado Produced Water Oily Wastewater Treatment Jar Test Colorado Oil Patch This sample is representative of the produced water from the Colorado oil patch region. The sample contains free and emulsified oil, dirt, and water. The water is very saline (high in dissolved solids especially chlorides and sodium) which is common in this industry. The sample pH was measured to be 6.8. ...
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Low cost treatment of wastewater containing mercury salts
Removal of mercury from wastewater is of considerable significance from an environmental point of view. Treatment of wastewater containing mercury salts has been carried out with the help of modified fly-ash bed. The preparation of the bed material has been described. The effects of different parameters such as pH, exchange capacity and the presence of other constituents have been studied. ...
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New technique for direct fluoroimmunomagnetic detection of rotavirus in water samples
A new rapid, sensitive and selective method for rotavirus detection in water samples is described in this paper. Amino pink magnetic microparticles were functionalized with monoclonal antibodies and used to capture, concentrate, separate and detect infectious rotavirus particles in distilled and drinking water samples. The fluorescence of the microparticles was used to determine the ...
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Monitor Organophosphorus Pesticides in Air, Using ORBO-49P Tubes and Capillary GC
A sampling tube containing Supelpak-20 resin and a glass fiber filter effectively adsorbs and releases five organophosphorous pesticides (chlorpyrifos, diazinon, dichlorvos, malathion, parathion) in vapor or aerosol form in air. At a sampling rate of 1L/min, 8 hour samples can be taken for all of these pesticides except malathion. Short term (15 min) samples can be taken at the same sampling ...
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