chemical analysis Articles

  • Featured Article on Laser Ablation Chemical Analysis – LIBS, LA-ICP-MS/OES, and LAMIS

    Laser ablation is a powerful approach to chemical analysis because of its versatility.  It has advantages in chemical analysis including direct characterization of solids, no chemical procedure of dissolution, which reduces the risk of contamination or sample loss, analysis of very small samples not separable from solution analysis, and determination of spatial distribution of elemental ...


    By Applied Spectra, Inc. (ASI)

  • The impact of fluctuation of the Nile River level on water composition

    This paper studies the influence of fluctuation of the Nile River level on water composition. The Nile River could be classified to four periods according to level. The periods are flood, intermediate, drought and intermediate. The present study investigates the biological and chemical analysis of water at all periods of the Nile River. The results show that the algae count ranged from 221 to ...


    By IWA Publishing

  • Nano-characterisation of dielectric breakdown in the various advanced gate stack MOSFETs

    Nano-scale physical analysis of breakdown in nano-scale high-κ gate stacks consisting of either polycrystalline-silicon or metal as gate electrode shows that the microstructural defects and damages induced by breakdown in the high-κ gate dielectric are different from that of conventional SiOxNy/poly-Si and Si3N4/poly-Si gate stacks. Chemical analysis using transmission electron microscopy ...


    By Inderscience Publishers

  • Tandem LA-LIBS – All in One Solid Sample Analyzer

    Dr. Rick Russo, Executive Chairman of Applied Spectra and a senior scientist at Lawrence Berkeley National Laboratory, shares his thoughts on shifting trend in the world of chemical analysis towards reducing sample preparation and direct solid analysis instrumentation with higher detection sensitivity and expanded elemental coverage. In this ...


    By Applied Spectra, Inc. (ASI)

  • Platinum Labware and It`s applications

    The Platinum is a metal extremely resistant to corrosion, high temperatures and attacks of acids. It's high resistance allows platinum and it's alloys to offer to the industry area a wide range of applications. It's used in the chemical, electrics, textile, glass, oil and mining industries, besides having it's alloys used in the manufacturing of cirurgic, optic and jewelry ...


    By Oregon Labware

  • Optimization for extracellular polymeric substances extraction of microbial aggregates

    The extracellular polymeric substances (EPS) are important macromolecular components in microbial aggregates. The three EPS extraction methods – ultrasound + cation exchange resins (CER) + sulfide, ultrasound + formamide + NaOH, and ultrasound + heat – were investigated in the study, and the component differences of extracted EPS from the loose ...


    By IWA Publishing

  • Analytical Methodology for the Characterization of Steels and Iron Alloys by Atomic Absorption Analysis

    The analysis of irons and steels has always been a very important job in the industrial and commercial environment. The grading of steels and iron alloys is critical to characterizing their respective strengths to corrosion and stress. There are also many protocols for the several hundred types of steels available. Fe is always the primary component, with elements such as Ni and Cr as major ...


    By Buck Scientific Inc

  • FOR QUALITY CONTROL PURPOSES NUTS HAVE TO ENDURE A GREAT DEAL

    Distributors as well as consumer have a great interest in their products meeting quality standards. For chemical analysis and quality control is a diligent sample preparation as a prerequisite for a fine analysis essential, in order to observe the predefined critical values and tolerance values. Perfectly suitable for the comminution of nuts are the FRITSCH Cutting Mills. CONSUMER ...


    By Fritsch Milling and Sizing

  • Effective methods for extracting extracellular polymeric substances from Shewanella oneidensis MR-1

    Extracellular polymeric substances (EPS) play crucial roles in bio-aggregate formation and survival of bacterial cells. To develop an effective but harmless method for EPS extraction from Shewanella oneidensis MR-1, five extraction methods, i.e. centrifugation (control), heating (40, 45, 50, and 60 °C), and treatments with H2SO4, ethylenediaminetetraacetic acid (EDTA) ...


    By IWA Publishing

  • Development of air quality indices for Mumbai, India

    This paper proposes a simple approach for developing air quality indices for different sites in an urban region of India. The database used for calculating these indices included various physical and chemical characteristics of suspended particulate matter, such as particle size distribution, chemical (elemental) properties and parameters governing the acidity of precipitation. The indices were ...


    By Inderscience Publishers

  • Management of organic wastes by earthworms: dual benefit for environment and society

    In the present study, two earthworm species, Eisenia fetida and Eudrilus eugeniae were employed to degrade the vegetable wastes and agro-residues. Chemical analysis of the vermicomposts derived from vegetable wastes showed that the quantity of organic carbon was reduced from 42.1% to 31.19 and 30.19% by E. fetida and E. eugeniae, respectively. The level of nitrogen, phosphorus, potassium and ...


    By Inderscience Publishers

  • Naturally endowed oxide nanoparticles from carbon ash in Saudi Arabia

    Chemical analysis of carbon ash powder obtained from water desalination plants in Saudi Arabia has revealed that 84.3% of the ash is pure carbon while the remaining percentage is combinations of oxide materials, mainly silicon and aluminium. These oxides were extracted by sintering the ash powder at 900°C. Shape and size of the obtained oxide powder were determined by transmission electron ...


    By Inderscience Publishers

  • Microbial technology applications in wellbore stimulation and oil recovery enhancement: a review

    The different microbial technologies to enhance oil recovery have not yet been proven for two main reasons. Firstly, most microbial enhanced oil recovery (MEOR) field trials lack structured research methodology. Secondly, it is difficult to interpret MEOR tests. In order to correlate qualitatively the effects on oil recovery with the nutrient injections, other variables should be kept constant ...


    By Inderscience Publishers

  • Best Practices for Optimizing PFAS Analysis

    Per- and polyfluoroalkyl substances (PFAS) are currently of great public health and environmental concern. Because PFAS are ubiquitous and commonly used in materials routinely employed for chemical analysis, laboratories are in need of streamlined protocols to minimize background contamination from these chemicals and quickly generate accurate data. This ebook outlines best practices, from the ...

  • A comparison of microbial contact bioassay with conventional elutriate assays for evaluation of wastes hazard

    The aim of this investigation was to develop a battery of bioassays - contact and elutriate tests with Bacillus pumilus, elutriate tests with Daphnia magna and Paramecium caudatum, for the assessment of the wastes' toxicity. The contact test with B. pumilus was more sensitive than the elutriate test. The estimated LID10 were much higher for Daphnia and Bacillus tests than for Paramecium test. No ...


    By Inderscience Publishers

  • The selective catalytic reduction of NO with propane over Ni loaded on H-USY in the presence of excess oxygen

    The abatement of NO with propane in the presence of excess oxygen has been investigated on several kinds of commercial USY (Ultra Stable Y zeolite) in the Na-form (Na-USY) and H-form (H-USY) or wet impregnated to various extents with Ni ions (Ni/USY) catalysts. Experimental results indicated that Ni/H-USY loaded with 15% Ni showed comparatively better catalytic activity for Selective Catalytic ...


    By Inderscience Publishers

  • X-Ray Radiographic Investigation of Perchloroethylene Migration at the Livingston Derailment Site

    X-ray radiography of soil cores was used as the primary test method to determine the reasons for the permeation of perchloroethylene into apparently impermeable clay layers at a hazardous chemical spill site. X-ray powder diffractometry, scanning electron microscopy, and chemical analysis were also performed to characterize the materials and structures observed in the soil cores through X ...


    By ASTM International

  • Soil Column Drainage Modelling Using a Geotechnical Centrifuge

    Equipment has been developed to facilitate supplying a soil column with water or draining a soil column under conditions of constant head while the soil column is under centrifugal forces in a geotechnical centrifuge. Accurate monitoring of the water mass transfer is also facilitated by the equipment. At the completion of a modelling sequence, the soil column may be partitioned for moisture ...


    By ASTM International

  • The Toxicity Identification of Inorganic Toxicants in Real World Samples

    Abstract :The toxicity of a sediment pore water and an effluent was characterized using Toxicity Identification Evaluation (TIE) procedures. Both samples exhibited acute toxicity to the freshwater crustaceanThamnocephalus platyurus. The TIE approach was conducted using an enlarged battery of fractionation tests. Toxicity of the pore water sample was removed or reduced significantly by the cation ...


    By Microbiotests Inc.

  • Did you take the opportunity to meet our hardbanding experts at OTC 2013?

    Castolin Eutectic and the OilTec division experienced great success at the Offshore Technology Conference 2013 in Houston USA, an industry event attracting yearly more than 80,000 attendees from more than 100 countries worldwide. Our booth visitors had the chance to test and experiment with our new line of OTW Hardbanding wires, which provide you with optimised performance for Oil and Gas ...


    By Castolin Eutectic

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