This was a very well attended meeting with the numbers reflecting an increasing world-wide demand for certified reference
materials. This is an inevitable consequence of the growth of schemes for the accreditation of the quality of measurement.
Authors:Young Sang Kwon, Sung-Gil Choi, Seung-Min Lee, Jong-Hwan Kim, and Jong-Su Seo
PCDD/Fs (EPA 1613 CS1 to CS5, LCS, and ISS) were certified purchases from Wellington Laboratories Inc. (Guelph, Ontario, Canada) and were used for the development of the analytical methodology. Certifiedreferencematerial (CRM) samples including BCR
A simple and rapid method was developed for the determination of selenium in human serum using a pre-irradiation separation technique of ultrafiltration followed by neutron activation analysis via the short-lived activation product77mSe. The method was validated using certified reference material.
Black spruce /Picea mariana/ twigs and needles have been collected from a uraniferous area of northern Saskatchewan and characterized for their content of some radionuclides and trace elements in an interlaboratory program. These materials, rich in uranium, are available as reference materials, for estimating accuracy in the analysis of vegetation, from the Canadian Certified Reference Materials Project in Ottawa, Canada.
The conditions for the determination of Co, Cr, Fe, Mn, Ni and Pb in plant materials and As, Ba, Fe, Pb, Sr, Rb and Zr in
soils by energy dispersive X-ray fluorescence analysis with americium-241 as excitation source are discussed. The applicability
of the proposed method is tested by the analysis of certified reference materials and of two plant biomonitors.
Aluminosilicate clay samples were analyzed for the constituent elements with respect to a certified reference material using microcrystalline cellulose powder as a binder for presentation as a pressed pellet to an energy dispersive X-ray fluorescence spectrometer. Sample preparation for presentation is highlighted. The data manipulation to achieve the analytical accuracy from the inherent precision is discussed.
Instrumental neutron activation analysis (INAA) was applied to assess trace element concentrations in six samples of aspirin
tablets acquired in São Paulo city, Brazil. Concentrations of the elements Br, Ca, Co, Cr, Fe, K, La, Na, Sc and Zn were determined.
Comparisons were made between the results obtained with published data for aspirins from foreign countries. Certified reference
materials, INCT-MPH-2 Mixed Polish Herbs were analyzed for quality control of the analytical results.
Authors:C. I. Yamashita, M. Saiki, and J. A. A. Sertié
Instrumental neutron activation analysis (INAA) was applied to determine the inorganic composition of leaves and extracts
from three different species of Casearia genus plant (C. sylvestris, C. decandra and C. obliqua). Statistical analysis of the analytical data of leaf showed that the three Casearia species present similar elemental composition. Extract from C. sylvestris showed significantly different inorganic content in comparison with the two other species. Certified reference material NIST
SRM-1515 Apple Leaves was analyzed for quality control.
Instrumental neutron activation analysis (INAA) was applied to determine Ca, Cl, Mg, Mn, Na, Sr and Zn in human dentin and
enamel tissues from carious and sound teeth. Comparisons were made between the results obtained in carious and sound dental
tissues for dentin and enamel. The findings obtained were also compared with the published data. Accuracy and precision of
the results were evaluated by analyzing certified reference material.
Authors:D. Desideri, M. Meli, C. Roselli, and L. Feduzi
Essential and non-essential elements in the parts (leaves, fruits) of several kinds of herbal tea and camomile marked in Italy
were determined by polarised X rays fluorescence spectrometer (EDPXRF). The quality of data was assured by calibrating the
instrument with certified reference materials. The elements are found to be present in different plants in various proportions
depending to soil composition and the climate in which the plant grows.