certified reference material Articles

Designed to vs. Certified

Most bolted steel tank companies use the term “designed to” when referring to industry and quality standards. At Superior Tank Co., Inc. we can positively confirm all of our tanks meet or exceed the expected design and quality objectives. Superior Tank has undergone the very rigorous API SPEC Q1 and ISO 9001:2008 certification process which reviews the various elements of bolted steel ...

Sep. 19, 2016

By Superior Tank Co., Inc.

EDXRF Analysis of Lead, Cadmium, Silver, Copper in Lead-Free Solder Materials

X-ray fluorescence analysis can be used to quickly and easily analyze samples in solid, powder, and liquid states nondestructively, and is therefore widely used as a screening technique for compliance with the RoHS/ELV directives. A large amount of lead-free solder is used for surface-mount circuit boards. Here we evaluated the sensitivity of analysis of Pb, Cd, Ag, and Cu in lead-free solder ...

Nov. 16, 2011

By Shimadzu Scientific Instruments Inc

Relative Accuracy Testing of an X-Ray Fluorescence-Based Mercury Monitor at Coal-Fired Boilers

ABSTRACT The relative accuracy (RA) of a newly developed mercury continuous emissions monitor, based on X-ray fluorescence, was determined by comparing analysis results at coal-fired plants with two certified reference methods (American Society for Testing and Materials [ASTM] Method D6784-02 and U.S. Environment Protection Agency [EPA] Method 29). During the first determination, the ...

Apr. 30, 2006

By Cooper Environmental Services

A novel cloud point extraction method for separation and preconcentration of cadmium and copper from natural waters and their determination by flame atomic absorption spectrometry

A sensitive and simple cloud point extraction method was developed for simultaneous separation and preconcentration of cadmium and copper prior to their determination by flame atomic absorption spectrometry. 4-phenyl-3-thiosemicarbazide was used as complexing agent and the cadmium and copper complexes were extracted from the aqueous phase by Triton X-114 surfactant. The effects of parameters ...

Jul. 7, 2017

By IWA Publishing

Merck KGaA, Darmstadt, Germany News on Water 2018, Volume 1

This volume of News on Water highlights: New ISO Standard 17943 for Determination of VOCs in Water by HS-SPME and GC-MS Extraction of Organic Compounds from Water, Using ENVITM-18 DSK Solid Phase Extraction Disks Watercol columns Certified Reference Materials ready-to-use for water and waste water analysis ...

May 21, 2018

By Merck KGaA, Darmstadt, Germany

Analysis of metal concentration levels in water, sediment and fish tissues from Toledo municipal lake by applying SR-TXRF technique

The main objective of this study was to evaluate the metal content in water and sediment from the Toledo municipal lake, as well as the concentration levels of heavy metals in muscle and liver of four fish species. A digestion procedure was performed in all fish samples. Metal analysis was performed by using the Synchrotron Radiation X-ray Fluorescence technique. The accuracy and validity of the ...

Dec. 31, 2010

By IWA Publishing

Determination of mercury speciation in fish tissue with a direct mercury analyzer

Knowledge of mercury speciation in tissue is valuable for assessing potential toxicological effects in fish. Direct mercury analyzers, which use thermal decomposition and atomic absorption spectrometry, have recently gained popularity for determining organic mercury after procedural solvent extraction from some environmental media, although quantitative recovery from lipid‐rich materials, such ...

Feb. 14, 2013

By John Wiley & Sons, Ltd.

News on Air 2013: Special Edition for Petrochemical Industry

This volume features Air Monitoring products that are used the petrochemical industry to ensure worker and community safety. Supelco's air monitoring products are useful for sampling of indoor (workplace) air and ambient air for a wide variety of analytes, such as aldehydes, volatile organic chemicals (VOC), benzene, toluene, ethyl benzene and xylene (BTEX) and other polyaromatic compounds ...

Feb. 12, 2014

By MilliporeSigma

Oil and grease in waste water

Determination of oil and grease in waste water according to Standard Methods AWWA 5520 This Application Note describes the extraction and determination of oil and grease from waste water samples following Standard Methods 5520 part D (Soxhlet Extraction Method). “Oil and grease” is defined as any material recovered as a substance soluble in the solvent. Therefore, compounds ...

Nov. 7, 2017

By BÜCHI Labortechnik AG

An interlaboratory comparison study for the determination of dialkyl phthalate esters in environmental and biological samples

A series of interlaboratory comparison exercises were conducted to assess the accuracy of dialkyl phthalate ester (DPE) concentration measurements in environmental and biological samples. Five laboratories participated in analyses to determine DPE concentrations in standard test solutions; marine sediments; three certified reference materials (CRMs), including CARP‐2 (fish muscle) and BCR‐07 ...

Jun. 14, 2012

By John Wiley & Sons, Ltd.

Analyzing sulfur in soil and sediment with handheld XRF

Background Sulfur creates more than nasty odors. Exposure to low levels (0-10ppm) of hydrogen sulfide (H2S) causes irritation of eyes, nose, and throat; higher levels can cause headaches, dizziness, nausea and vomiting, coughing, and breathing difficulty. H2S and numerous other odor-causing compounds are generated as a result of organic material decomposition. In the case of the Muddy River in ...

Aug. 3, 2010

By Thermo Scientific Niton Analyzers

University Campus Restoration Earns SITES Certification

Project is designed to mimic the function of natural desert riparian corridors using native soils, rocks and vegetation to slow and cleanse storm water. The University of Texas at El Paso’s (UTEP) Campus Transformation Project (CTP) was awarded Silver certification under the Sustainable SITES Initiative (SITES) rating system, and is the first project to certify under SITES v2 (Version 2). ...

Dec. 12, 2016

By BioCycle Magazine

Measuring level by weight

Measuring level or inventory by weight provides high accuracy. The weight is not affected by ingredients that foam or settle unevenly or by changes in density or the shape of the tank. Weight is weight, regardless of percent solids, bridging, rat-holing, or whether your ingredient is conductive or sound-absorbing. Because weighing is a noncontact method of measuring level, there is no chance of ...

Sep. 30, 2006

By Hardy Process Solutions

A new ligandless cloud point extraction method for preconcentration of iron from natural water samples and FAAS detection

A simple, efficient and inexpensive ligandless cloud point extraction method was developed for the preconcentration of trace amounts of iron from natural water samples, followed by flame atomic absorption spectrometry detection. The proposed method is based on the extraction of Fe(III) ions at pH 7.0 using the non-ionic surfactant Triton X-114 without the addition of any chelating ligand. The ...

Mar. 17, 2017

By IWA Publishing

Determination of Cadmium in the Tap Water by Flameless Atomic Absorption Spectrometry

The standard for the allowable concentration of cadmium in tap water has been revised downward from 0.01 mg/L or less to 0.003 mg/L or less according to Japan's "Ministerial Ordinance for Partial Revision of the Ordinance Concerning the Water Quality Standard" (The Ministry of Health, Labour and Welfare Ordinance No.18) (February 17, 2010). The revised standard has been in effect since April 1, ...

Nov. 16, 2011

By Shimadzu Scientific Instruments Inc

Using FIMS to determine mercury content in sewage sludge, sediment and soil samples

Tim Flow Injection Mercury System (FIMS) is a dedicated system that integrates flow injection mercury cold vapor generation with a very sensitive detector. The exceptional system stability and the long path measurement cell provide instrumental detection limits as low as 5 ng/L using a sample volume of 5(H) jxL. The improved sensitivity of the FIMS permits sample dilution, therefore reducing the ...

Oct. 27, 2011

By PerkinElmer, Inc.

Arsenic, antimony and chromium speciation using HPLC-ICP-MS in selected river ecosystems of Upper Silesia, Poland – a preliminary study and validation of methodology

Upper Silesia is the most transformed by humans of the Polish territories. As a result of mining, urbanization and other industrial activities, irreversible changes have taken place in the environment. In this paper, the method of collecting, preserving, storing and preparing samples from four Silesian rivers was optimized. Silesian sediment and river water samples are a challenge for the ...

Sep. 24, 2015

By IWA Publishing

Quantitative Analysis of Geological Samples- X-Calibur

Abstract Quantitative and qualitative analysis of geological samples (rocks and river sediments) was performed on Xenemetrix EDXRF Benchtop Spectrometer System, model X-Calibur Objective: Perform XRF measurements on certified geological reference materials to build calibration curves for the major oxides (Na2O, MgO, SiO2, Al2O3, SiO2, P2O5, ...

Jul. 31, 2017

By Xenemetrix Ltd.

$Evaluation of two in vitro protocols for determination of mercury bioaccessibility: influence of mercury fractionation and soil properties$

Evaluation of two in vitro protocols for determination of mercury bioaccessibility: influence of mercury fractionation and soil properties

Received for publication November 10, 2008. Soil ingestion by children can be a significant exposure pathway to mercury (Hg). Unfortunately, no reliable in vivo results for Hg oral bioavailability determination in soils have been published. In vitro extractions enable the assessment of metals' bioaccessibility, which is an estimate of oral bioavailability. Therefore, the goal of this study was to ...

Nov. 29, 2009

By Soil Science Society of America (SSSA)

Rapid high-performance sample digestion for ICP determination by ColdBlock™ digestion: part 2: gold determination in geological samples

A procedure is described to tackle a weakness in laboratory analysis of geological materials, notably (1) systematic low gold recovery during wet sample dissolution using aqua regia, and (2) severe memory effect of gold during sample transportation and nebulization in conventional ICP/ICP-MS sample introduction systems. Modified aqua regia, in which hydrochloric acid is replaced by ...

Jul. 27, 2014

By MANTECH Inc.

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