Development of a certified reference material for specific surface area of quartz sand
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منابع مشابه
Development of a Certified Reference Material for the Analysis of Vitamins in Infant Formula
An infant formula certified reference material (CRM) for the analysis of vitamins was developed. Vitamin A, folic acid, niacin, were certified and their stability has been monitored by using isotope dilution-liquid chromatography/mass spectrometric (ID-LC/MS) methods developed in our laboratories as primary methods for the corresponding analytes. Certification of α-, δ-, and γtocopherols in the...
متن کاملDevelopment of a Certified Reference Material for Nicotinamide in Infant Formula
Nicotinamide, one kind of Vitamin B, plays an important role for humans. To ensure quality control of nicotinamide in infant formula, a Certified Reference Material for nicotinamide in infant formula is being prepared in China for the first time. Studying on the procedure of sample preparation and HPLC analysis with different detectors like UV and MS, HPLC-UV and HPLC-IDMS are selected as the v...
متن کاملinvestigating the feasibility of a proposed model for geometric design of deployable arch structures
deployable scissor type structures are composed of the so-called scissor-like elements (sles), which are connected to each other at an intermediate point through a pivotal connection and allow them to be folded into a compact bundle for storage or transport. several sles are connected to each other in order to form units with regular polygonal plan views. the sides and radii of the polygons are...
development of different optical methods for determination of glucose using cadmium telluride quantum dots and silver nanoparticles
a simple, rapid and low-cost scanner spectroscopy method for the glucose determination by utilizing glucose oxidase and cdte/tga quantum dots as chromoionophore has been described. the detection was based on the combination of the glucose enzymatic reaction and the quenching effect of h2o2 on the cdte quantum dots (qds) photoluminescence.in this study glucose was determined by utilizing glucose...
Human urine certified reference material for arsenic speciation.
BACKGROUND Chemical speciation analysis is essential for the biological monitoring of inorganic arsenic exposure using urine as indicator medium. There is increasing demand for a certified reference material (CRM) of urine matrix for arsenic speciation. METHODS Urine (10 L) was collected from non-occupationally exposed Japanese males. We prepared 954 bottles of urine, each containing approxim...
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ژورنال
عنوان ژورنال: Reference materials
سال: 2017
ISSN: 2077-1177
DOI: 10.20915/2077-1177-2017-13-2-21-26