Reference materials
Effective density of Aquadag and fullerene soot black carbon reference materials used for SP2 calibration
... BC reference materials such as Aquadag®, glassy carbon or fullerene ...BC materials and that fullerene soot behaves most similar to ambient BC in some ways (Moteki and Kondo, 2010; Moteki et ...
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Exploratory analysis of pH reference materials for quality control acceptance by chemometrics algorithms
... Certified Reference Material (CRM) is a reference material, accompanied by a documentation body providing one or more of specified property values with associated uncertainty at a stated level of confidence ...
98
Simple procedure for nutrient analysis of coffee plant with energy dispersive X-ray fluorescence spectrometry (EDXRF)
... certified reference materials made from leaves were used to calibrate and check the trueness of EDXRF method for the determination of the concentration of several nutrients in coffee leaves and ...
5
Determination of uranium in tree bark samples by epithermal neutron activation analysis
... Results obtained in this study demonstrated that procedure of ENAA using short irradiation could be applied satisfactorily in U determination in environmental samples of tree barks. The results ob- tained in the analyses ...
11
J. Braz. Chem. Soc. vol.26 número2
... As in many other countries, laboratories in Brazil depend on reference materials (RMs) prepared in North America, Europe or Japan to apply such quality control. In addition to the inherent barriers for ...
13
J. Braz. Chem. Soc. vol.25 número6
... certifying reference materials (RMs) of pure compounds, National Institute of Metrology, Quality and Technology (Inmetro) participated in a key-comparison named ...
7
An assessment of monazite from the Itambé pegmatite district for use as U –Pb isotope reference material for microanalysis and implications for the origin of the “Moacyr” monazite
... isotope reference materials for LA-ICP-MS and to track the origin of a piece of the Moacyr monazite (termed here Itambé), a widely used reference material for LA-ICP-MS U–Pb geo- ...
21
J. Braz. Chem. Soc. vol.23 número9
... certified reference materials (CRM) or candidate CRMs of the active pharmaceutical ingredients (API) captopril, metronidazole, sodium diclofenac, potassium diclofenac and furosemide, by means of different ...
11
Use of Constrained Mixture Design in the Optimization of a Method Based on Extraction Induced by Emulsion Breaking for the Determination of Ca, Mg, Mn, Fe and Zn from Palm Oil by Flame Atomic Absorption Spectrometry
... certified reference materials for palm oil, the accuracy of the developed method was evaluated from two methodologies: (i) using addiction/recovery tests, where the five studied metals are spiked (using ...
8
J. Braz. Chem. Soc. vol.25 número11
... validity of the proposed method was checked with standard reference materials and it has been successfully applied for the determination of trace Pb(II) and Cd(II) in water, herbal and [r] ...
10
Braz. J. Geol. vol.46 suppl.1
... several reference studies dedicated to in situ Sr isotopes in diferent minerals and use a REE- and Rb- poor present-day marine carbonate (Sr: 1000 – 2000 ppm) as an “in-house” standard to check for external ...
17
J. Bras. Patol. Med. Lab. vol.50 número1
... of reference materials in order to assure and perform the quality control of analytical measurements is a requirement in clinical ...the reference specimens for producing the internal quality ...
10
Aspiration-based reference dependence
... In the representation above, the DM has a utility function u. Given a choice problem (S, T ), she first maximizes u over all the alternatives she can perceive in order to identify her aspiration points. For each ...
33
Building materials with historical and heritage interest – A database in progress
... constituent materials in order to provide recommendations concerning the intervention plan, and the materials and the techniques to be ...of materials, when available, is usually shared by different ...
7
Braz. J. Phys. vol.35 número2B
... Relativity, reference frames are abstract and don’t really correspond to physical objects: reference frames are described through their (relative) speeds with no reference to their ...regime, ...
7
Rev. IBRACON Estrut. Mater. vol.6 número4
... in the chemical composition of the BW (Table 1). The SW-BW-PC paste presented at the ages of 1 and 3 days peaks associated with C-S-H and CH. At the age of 7 days, a peak was related to the CASH. At the age of 28 days, ...
10
MATERIALS AND METHODS Materials
... Studies were conducted on the production of protease by moderately halophilic Bacillus sp. on agro-industrial waste materials. The bacterium could efficiently use many agro wastes as substrates but wheat bran ...
8
Ciênc. saúde coletiva vol.20 número4
... base was authorized by the Coordinating Office of the Food and Nutrition technical area of the Barra Mansa Municipal Health Department. Initially the profile of the mothers and children aged 6 to 12 months was ...
10
MATERIALS AND METHODS Raw materials and evaluated treatments
... The results obtained for the parameters: density (before and after treatment), water absorption (at 2 hours and 24 hours), thickness swelling (at 2 hours and 24 hours), residual swellin[r] ...
8
MATERIALS AND METHODS Raw Materials and tannin estimation
... anti-nutritional effects of tannins in animal feed. In the medical industry, it is used in the production of gallic acid, a substrate for the chemical synthesis of trimethoprim, propyl gallate, dyes and inks etc. (13, ...
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