certified reference material Articles

ERM-Application Note 7: Prolonging the validity of reference material certificates

Certificates of certified reference materials have limited viability, either because of unknown behaviour of opened samples or a general limitation of liability. In certain circumstances, users may on their own responsibility decide to continue using a CRM beyond the stated validity of the certificate. We have released an application note (ERM Application Note 7) that explains the information ...

May 2, 2019

By European Commission, Joint Research Centre (JRC)

A Cleaning Validation Swab Recovery Study using a UV/Persulfate Analyzer

Abstract Pharmaceutical cleaning validation is a multistep process. The Food and Drug Administration (FDA) has published guidelines on cleaning validation as far back as 1963 in Good Manufacturing Practices (GMP) Regulations (Part 133.4). In general, the FDA expects firms to have written Standard Operating Procedures (SOP’s) detailing the cleaning processes of their manufacturing equipment ...

Nov. 3, 2011

By Teledyne Tekmar

Evaluation of a New Analytical Trap for Gasoline Range Organics Analysis

Abstract Pharmaceutical cleaning validation is a multistep process. The Food and Drug Administration (FDA) has published guidelines on cleaning validation as far back as 1963 in Good Manufacturing Practices (GMP) Regulations (Part 133.4). In general, the FDA expects firms to have written Standard Operating Procedures (SOP’s) detailing the cleaning processes of their manufacturing equipment ...

Oct. 10, 2011

By Teledyne Tekmar

Reagents and standards for salts in water

The methods for assessing the levels of salts in Water are described in the Official Methods of Analysis of AOAC International, 19TH Edition 2012 Volume 1. Reagecon as one of the largest producers of Physical and Chemical Standards and Certified Reference Materials worldwide, recognise that the growth in the use of such standards requires an innovative approach to the presentation of our ...

Jun. 18, 2018

By Environmental Technology Publications Limited

Reagents and standards as per standard methods for the examination of water and wastewater 21st Edition 2005, APHA AWWA WEF

As one of the largest producers of Physical and Chemical Standards and Certified Reference Materials worldwide, Reagecon recognise that the growth in our range and the use of such standards requires an innovative approach to the presentation of our products. Focussing on water analysis, this catalogue details the standards, reagents and indicators for different test methods according to the ...

May 22, 2015

By Environmental Technology Publications Limited

Particle Sizing and Zeta Potential of Silica Koestrosol (Basis for Certified Reference Material ERM‐FD100 for Nanoparticles) by Acoustics and Electroacoustics

Precipitated silica Koestrosol 1530 is the basis for the recently adopted certified reference material ERM‐FD100 used for nanotechnology. A similar reference material based on another precipitated silica (silica Ludox™) has been used for testing ultrasound based instruments for particle sizing and zeta potential in concentrated dispersions and emulsions for the past two decades. In this study we ...

Mar. 22, 2012

By Dispersion Technology Inc.

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 Detect low concentrations of impurities in water The Standard ...

May 22, 2018

By Merck KGaA, Darmstadt, Germany

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. 8, 2017

By IWA Publishing

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. 18, 2017

By IWA Publishing

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 ...

Jan. 1, 2011

By IWA Publishing

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. 13, 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 with ...

Nov. 8, 2017

By BÜCHI Labortechnik AG

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. 25, 2015

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. 15, 2013

By John Wiley & Sons, Ltd.

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. 15, 2012

By John Wiley & Sons, Ltd.

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. 17, 2011

By Shimadzu Scientific Instruments Inc

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. 17, 2011

By Shimadzu Scientific Instruments Inc

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, SO3, K2O, CaO, TiO2, MnO and Fe2O3) and for trace ...

Aug. 1, 2017

By Xenemetrix Ltd.

The determination of major and minor elements in air filters and urine for hazard assessment, using a new CCD DUAL-VIEWED ICP optical emission spectrometer

This article describes the application of a new type of CCD-based, dualviewed ICP optical emission spectrometer for the analyses of industrial hygiene types of samples. Several trace elements in air filter media are determined by ICP-OES. Urinary electrolytes and trace elements are determined in a single dilution automatically in both the axial and radial plasma viewing orientations. Results of ...

Oct. 28, 2011

By PerkinElmer, Inc.

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. 4, 2010

By Thermo Scientific Niton Analyzers

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