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Title: New reference material for analysis of elements in glutinous rice produced at the National Institute of Metrology (Thailand)
Authors: Charun Yafa
Sirinapha Srithongtim
Pranee Phukphatthanachai
Araya Thiparuk
Nittaya Sudsiri
Laddawan Rojanapantip
Mayuree Uraroongroj
Panawan Kluengklangdon
Preeyaporn Jaengkarnkit
Kittipong Sirisuthanant
Chamoy Thonglue
Thanida Pimma
Paramee Pengpreecha
Tippaya Julwee Fortune
Ratirot Zwicker
Vorapot Permnamtip
Sirinart Laoharojanaphnad
Boonlert Suanmamuang
Juwadee Shiowatana
Weerawan Waiyawat
Atitaya Siripinyanond
Kunchit Judprasong
Benjawan Boonsong
Suwaluck Talaluck
Chainarong Cherdchu
Thailand Ministry of Science and Technology
School of Environment, Resources and Development
Thailand Ministry of Public Health
National Food Institute
Department of Livestock Development (DLD)
Central Laboratory (Thailand) Co.
Thailand Institute of Scientific and Technological Research (TISTR)
Thailand Institute of Nuclear Technology, Bangkok
Mahidol University
Padaeng Industry Public Company Limited
Keywords: Chemical Engineering;Chemistry;Engineering;Physics and Astronomy
Issue Date: 1-Apr-2010
Citation: Accreditation and Quality Assurance. Vol.15, No.4 (2010), 223-231
Abstract: Reference materials play an important role for evaluating the accuracy of analytical results, and are essential parts of good laboratory practice. They represent a key tool for quality control of chemical analyses. In Thailand, the demand of food and environmental reference materials is constantly increasing, and the National Institute of Metrology (NIMT, Thailand) is responding to the urgent needs for affordable materials, which require collaborative efforts at the national level. This paper describes the preparation of a new glutinous rice reference material, along with homogeneity and stability studies and the analytical work carried out for the certification of the contents of inorganic elements. The incurred material was collected from an actual rice paddy field. Material preparation along with homogeneity and stability testing were carried out at the Environmental Research Training Centre (ERTC). The homogeneity study was designed to have three experimental conditions; (A) 10 bottles of candidate materials being analyzed each with 2 replicates, (B) 20 bottles with 2 replicates, (C) 10 bottles with 7 replicates, in order to study the suitable treatments for homogeneity testing in the reference material production. It was shown that a minimum number of 10 bottles with duplicate analyses are enough to demonstrate the homogeneity of candidate reference material. Certification of a candidate reference material in a single laboratory using reference method was confirmed with an interlaboratory comparison participated by a certain number of well recognized testing laboratories in Thailand. Further elaborative results will be discussed. © Springer-Verlag 2009.
ISSN: 09491775
Appears in Collections:Scopus 2006-2010

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