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NIST Micronutrients Measurement Quality Assurance Program Winter and Summer 2017 Comparability Studies
Data provided by National Institute of Standards and Technology
The Micronutrients Measurement Quality Assurance Program (MMQAP) was coordinated by the Chemical Sciences Division and supported measurement technology for selected fat- and water-soluble vitamins and carotenoids in human serum. This program was initiated in 1984 by the National Cancer Institute Division of Cancer Prevention and Control to ensure the long-term reliability of the measurements made while studying the possible cancer chemoprevention roles of these compounds.
Tags: interlaboratory comparisons,Biosciences and Health,Energy,Environment and Climate,Food and Nutrition,fat-soluble vitamins,Carotenoids,Vitamin C,Human Serum,interlaboratory study,
Modified: 2024-02-22
Views: 0
Certified values of iodine in CRMs of food matrices in mg/kg units. The uncertainties are expanded uncertainties at approximately 95% confidence.
Data provided by National Institute of Standards and Technology
A comparison of the expanded uncertainty for certified values of iodine in food matrix CRMs. The CRMS were found by searching The European Virtual Institute for Speciation Analysis (EVISA) database using the terms "Iodine" and "Certified" in the Material category. The uncertainties are expanded uncertainties at approximately 95% confidence.
Tags: food,nutrition,dietary supplements,Standard Reference materials,reference materials,SRM,RM,Food and Nutrition,
Modified: 2024-02-22
Views: 0
An approach for identification and determination of arsenic
Data provided by National Institute of Standards and Technology
A method for the identification and determination of arsenosugars in the extract of kelp
Tags: kelp,arsenosugar,arsenic species,INAA,LC-ICP-MS,identification,IT-TOF,microwave digestion,Food and Nutrition,
Modified: 2024-02-22
Views: 0
SRM 2585 Organic Contaminants in House Dust
Data provided by National Institute of Standards and Technology
SRM 2585 Organic Contaminants in House Dust - This Standard Reference Material (SRM) is intended for use in evaluating analytical methods for the determination of selected polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyl (PCB) congeners, chlorinated pesticides, and polybrominated diphenyl ether (PBDE) congeners in house dust and similar matrices. All of the constituents for which certified, reference, and information values are provided in SRM 2585 were naturally present in the dust material before processing.
Tags: Standard Reference Material,SRM,SRM 2585,House Dust,certified values,Environment and Climate,
Modified: 2024-02-22
Views: 0
SRM 972a Vitamin D Metabolites in Frozen Human Serum
Data provided by National Institute of Standards and Technology
SRM 972a Vitamin D Metabolites in Frozen Human Serum - This Standard Reference Material (SRM) is intended for use as an accuracy control in the critical evaluation of methods for determining the amount-of-substance concentration of vitamin D metabolites in human serum. This SRM can also be used as a quality assurance tool for assigning values to in-house control materials for these constituents. This data is public in the Certificate of Analysis for this material.
Tags: Standard Reference Material,SRM,SRM 972a,Frozen Human Serum,certified values,reference values,Vitamin D Metabolites,25-hydroxyvitamin D3,25-hydroxyvitamin D2,3-epi-25-hydroxyvitamin D3,24R,25-dihydroxyvitamin D3,Biosciences and Health,
Modified: 2024-02-22
Views: 0
SRM 2973 Vitamin D Metabolites in Frozen Human Serum (High Level)
Data provided by National Institute of Standards and Technology
SRM 2973 Vitamin D Metabolites in Frozen Human Serum (High Level) - This Standard Reference Material (SRM) is intended for use as an accuracy control in the critical evaluation of methods for determining the amount-of-substance concentration of vitamin D metabolites in human serum. This SRM can also be used as a quality assurance tool for assigning values to in-house control materials for these constituents. This data is public in the Certificate of Analysis for this material.
Tags: Standard Reference Material,SRM,SRM 2973,Frozen Human Serum,certified values,reference values,Vitamin D Metabolites,25-hydroxyvitamin D3,25-hydroxyvitamin D2,3-epi-25-hydroxyvitamin D3,24R,25-dihydroxyvitamin D3,Biosciences and Health,
Modified: 2024-02-22
Views: 0
SRM 3239 Isoflavones Calibration Solution
Data provided by National Institute of Standards and Technology
SRM 3239 Isoflavones Calibration Solution - This Standard Reference Material (SRM) is intended primarily for use in calibration of instruments and techniques used for the determination of isoflavones. SRM 3239 consists of two solutions containing isoflavones at levels that reflect the mass fraction ratios found in soy products. This data is public in the Certificate of Analysis for this material.
Tags: Standard Reference Material,SRM,SRM 3239,certified values,nutrition,dietary supplements,isoflavones,Food and Nutrition,
Modified: 2024-02-22
Views: 0
SRM 999c Potassium Chloride (High-Purity Chemical)
Data provided by National Institute of Standards and Technology
This Standard Reference Material (SRM) is intended for use as an analytical standard of known potassium (K) and chloride (Cl-) content. This lot of potassium chloride (KCl) was prepared to ensure a material of high purity and homogeneity and has been assayed after drying at 500 °C. A unit of SRM 999c consists of a single glass bottle containing 30 g of the material. This data is public in the Certificate of Analysis for this material.
Tags: high purity chemical,clinical,Standard Reference Material,SRM,potassium chloride,potassium,chloride,Food and Nutrition,
Modified: 2024-02-22
Views: 0
SRM 2193a Calcium Carbonate pH Standard [used as saturated Ca(OH)2 solution]
Data provided by National Institute of Standards and Technology
SRM 2193a Calcium Carbonate pH Standard [used as saturated Ca(OH)2 solution] - This Standard Reference Material (SRM) is intended for use in preparing solutions for calibrating electrodes for pH measuring systems at pH values above 11.0. This lot of calcium carbonate (CaCO3) was selected for its low level of alkali metal impurities. However, this SRM is certified ONLY as a pH standard, NOT as a pure substance. A unit of SRM 2193a consists of 30 g of CaCO3. This data is public in the Certificate of Analysis for this material.
Tags: Biosciences and Health,Environment and Climate,Food and Nutrition,
Modified: 2024-02-22
Views: 0
SRM 909c Frozen Human Serum
Data provided by National Institute of Standards and Technology
Standard Reference Material 909c Frozen Human Serum - This Standard Reference Material (SRM) is intended primarily for use in validating analytical methods for the determination of specified constituents in human serum. This SRM can also be used for quality assurance when assigning values to in house control materials. A unit of SRM 909c consists of three vials, each containing 2 mL of frozen human serum. This data is public in the Certificate of Analysis for this material.
Tags: Standard Reference Material,SRM,SRM 909c,Frozen Human Serum,certified values,reference values,metabolites,electrolytes,Biosciences and Health,
Modified: 2024-02-22
Views: 0