laboratory sample preparation Articles

  • The productive environmental laboratory: BSK Labs boosts efficiency with Metrohm IC

    BSK Labs runs a number of environmental laboratories and service centers along the west coast of the US. A total of 70 employees – including microbiologists, chemists, lab technicians, and support staff – make sure that the 200 to 350 samples that come in every week are analyzed. BSK Labs specializes in potable water chemistry, ground water monitoring, storm water runoff, solid waste ...


    By Metrohm AG

  • Aflatoxin & ochratoxin sample preparation columns

    Simultaneous Analysis of Aflatoxins and Ochratoxin A - Sample Preparation Aflatoxins and Ochratoxin A are produced by fungi, e.g. Aspergillus and Penicillium species. Therefore both toxin types are found together in many foods and animal feeds, e.g. cereals. Thus it is appropriate to analyze one extract for the occurrence of both mycotoxins in a single step. A significant assistance ...


    By Pickering Laboratories, Inc.

  • The Preparation of Hollow Cylinder Specimens from Undisturbed Tube Samples of Soft Clay

    The use of torsional-hollow cylinder testing apparatus for research into soil stress-strain behavior has grown over the past decade. Most studies have focused on sands or on cohesive materials reconstituted in the laboratory. Studies involving undisturbed soft clay have been neglected, in part due to the difficulties involved in specimen preparation.The present paper describes a procedure for the ...


    By ASTM International

  • Sample Handling Strategies for Accurate Lead-In-Soil Measurements in the Field and Laboratory

    ABSTRACT The inhomogenous lead-in-soil matrix can present serious obstacles to accurate sample collection and handling. In typical lead-in-soil measurement, particle size related errors in sampling and sample handling often exceed all other sources of error. The magnitude of error can vary widely depending on the particulate nature of the lead contaminant and the effectiveness of control ...

  • PPCPs: Preparing for an uncertain regulatory future

    A recent study published in Environmental Pollution* identified 56 active pharmaceutical ingredients (APIs) in effluent samples from 50 large wastewater treatment plants across the U.S. Among the products found in samples were commonly prescribed anti-psychotic and antihypertensive drugs. As more studies continue to fuel public concerns over risks to public health and the environment, wastewater ...

  • Laboratory algal bioassays using PAM fluorometry: Effects of test conditions on the determination of herbicide and field sample toxicity

    Pulse Amplitude Modulation (PAM) fluorometry, based on chlorophyll a fluorescence, is a frequently used technique in algal bioassays to assess toxicity of single compounds or complex field samples. It is known that several test conditions can influence the test results and since a standardized test protocol is currently lacking, it is difficult to link the results of different studies. ...


    By John Wiley & Sons, Ltd.

  • The Five Factors of Smart Laboratory Success

    The Five Factors Research organizations are under pressure to cut costs while maintaining or increasing throughput. To improve their operations, many laboratories are considering investments in data management or support and automation systems like ELNs, LIMS or Robotics/HTS. Whatever the change that is introduced, there are many pitfalls on the way to delivery, roll-out and ...

  • Stabilization of Liquefiable Samples During Transport

    This technical note presents a new method to transport liquefiable soils from the investigation site to the laboratory. The development of this method resulted from research on liquefiable soils from the Imperial Valley, CA. This method is based upon the application of a slight vacuum on the pore water of the soil. The vacuum decreases the pore pressure, and therefore increases the effective ...


    By ASTM International

  • A Laboratory using Bromoform: Hazardous Substances Case Study

    This Case Study has been prepared as one of a series which demonstrates how an employer would go about applying the different Sections of Workplace Health & Safety Regulation Part 13: Hazardous Substances in a workplace. It is not directly about bromoform, but uses the circumstances of a laboratory which uses bromoform for separating various minerals from sand samples. ...


  • Sitelab gains laboratory certification with New Jersey DEP

    Located in New Jersey?  Use UVF instead of Gas Chromatography to save time and money on your next project! The New Jersey Department of Environmental Protection is the first state regulatory agency in the country to approve and certify the use of field analytical methods as part of their "Triad Approach," without compromising data quality and reliability.  Using UVF for ...


    By Sitelab Corporation

  • How to choose the best laboratory for your microbiology analysis

    For indoor air quality professionals, choosing a good microbiology lab is one of the most important business decisions you can make. How do you know that the fungal data that you are receiving is accurate? Will it stand up in court? Has an educated, experienced, trained analyst actually thought about your sample and your project, understood what you were looking for, and then used their knowledge ...


    By EMLab P&K

  • The 10 Key Factors in Selecting a Stack Sampling Firm

    Summary: This document is a summary of the key factors that you should take into consideration when hiring a stack testing firm.This has been prepared in conjunction with the ASTM criteria for standard practice of testing companies.The ASTM criteria has been supplemented, based on 125 years of direct testing experience, which is the combined years of experience of the individuals that contributed ...

  • Analysis of biogenic amines food and physiological samples

    Histamine and other polyamines such as Putrescine, Cadaverine, Spermidine and Spermine are products of decomposition. The level of histamine, in particular, has been used as a regulatory guideline for degree of decomposition in fish. Also, Histamine and Tyramine levels are of interest to producers of wine and cheese. The polyamines, Spermidine, Spermine and Putrescine are elevated in neoplastic ...


    By Pickering Laboratories, Inc.

  • Preparation of N-doped TiO2 by oxidizing TiN and its application on phenol degradation

    Incomplete oxidation of titanium nitride (TiN) to prepare nitrogen-doped TiO2 was verified by calcining TiN at different temperatures in air for 30 min. The as-prepared samples were characterized by X-ray diffraction, UV-Vis diffuse reflectance spectra and X-ray photoelectron spectroscopy. The results confirmed that oxidizing TiN incompletely is an effective and simple method to prepare ...


    By IWA Publishing

  • Asbestos in water? How to address ‘non-standard’ samples of industrial and other effluents

    Biohazards and other interferences complicate the employment of off-the-shelf asbestos in water methods by traditional TEM techniques. Laboratories must implement creative strategies to prepare and analyze these samples to produce meaningful analytical data. Laboratory and personnel safety have to be considered before sample handling. The interferences also greatly diminished any reasonable ...

  • Bardstown, Kentucky - industrial cleaning; on-site laboratory case study

    After years of operation serving the auto parts industry, this zinc and chrome plating plant in Bardstown, Kentucky closed several years ago. It was comprised of three three main plating lines, and it was a mess. Extensive contamination, particularly chrome and acid residue, was present in the plant. In some places sludge on the floor was several inches thick. One of the major challenges ...

  • Matrix Gemini LIMS at work in a Health Screening Laboratory Case Study

    Eastern Deanery Aids Relief Program (Nairobi, Kenya) has improved data recording, speeded up sample throughput and allowed a direct link to existing electronic patient records by replacing its paper-based laboratory documentation system with Matrix Gemini LIMS. Background Eastern Deanery Aids Relief Program (EDARP) is a non-profit Christian faith-based organization which serves ...


    By Autoscribe Informatics

  • Sampling guidelines for handheld Raman measurements; what you need to know

    In recent years. Raman spectroscopy has seen increased adoption as the technique of choice for the rapid identification of materials; especially for raw material identification in the pharmaceutical industry, identification of controlled substances and explosives for security applications, polymer material identification for packaging and plastics recycling, and mineral and gemstone ...


    By B&W Tek

  • Environmental, Safety & Health Compliance System pays off for Brookhaven National Laboratory

    Brookhaven National Laboratory (BNL), one of ten national laboratories managed by the U.S. Department of Energy (DOE) Office of Science, is a world leader in scientific research. Its scientists are known for their work in nuclear and high-energy physics; environmental and energy research; neurosciences, medical imaging, structural biology and nano-technology. BNL conducts research that enhances ...


    By IHS

  • Comparing Field Portable X-Ray Fluorescence (XRF) To Laboratory Analysis Of Heavy Metals In Soil

    ABSTRACT Field portable x-ray fluorescence (XRF) continues to gain acceptance as a complement to traditional laboratory testing of metal contaminated soil. The quality of data produced by field XRF varies with site conditions, soil composition, and sample preparation. Quality assurance protocols for the field method usually require that a number of field samples be split and sent to a ...

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