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SRM 968f Fat-Soluble Vitamins in Human Serum
Standard Reference Material (SRM) 968 and its reissues are human serum based materials used as validation standards by clinical, epidemiological, and nutrition laboratories. Historically, about 300 units of this SRM have been sold annually. Based on this annual sales projection, as of November 1, 2015 there were about 16 months of inventory of the current issue: SRM 968e Fat-Soluble Vitamins, Carotenoids, and Cholesterol in Human Serum. To avoid a gap in service to our customers, it is necessary to have the next issue of SRM 968 available for use in several NIST-organized interlaboratory comparison studies. Candidate SRM 968f Fat-Soluble Vitamins in Human Serum was prepared by the contractor as a two-component renewal. Approximately 3000 (± 10 %) vials of each of the two serum pools were delivered to NIST in March 2016. This material will be certified by NIST for retinol, alpha- and beta-/gamma-tocopherol. Other selected analytes measured by collaborating laboratories will be provided as reference or information values. Samples for these studies were shipped to participants in the NIST Micronutrients Measurement Quality Assurance Program for analysis beginning in early June 2016. NIST will evaluate this data for possible value assignment of the analytes of interest.
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SRM 972a Vitamin D Metabolites in Frozen Human Serum
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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.
SRM 2378 Fatty Acids in Human Serum
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Donor serum for SRM 2378 was collected from three groups of individuals: (level 1) three healthy donors who took 1000 mg/day of fish oil supplements for a minimum of one month prior to collection; (level 2) three healthy donors who took 1000 mg/day of flaxseed oil supplements for a minimum of one month prior to collection; and (level 3) three healthy donors who did not take either fish or flaxseed oil supplements for one month prior to collection. Value assignment of the mass fractions of the fatty acids in SRM 2378 was based on the results of one or two analytical methods at NIST and one analytical method at the Centers for Disease Control (CDC) with confirmation by data provided by an interlaboratory comparison. This data is public in the Certificate of Analysis for this material.
SRM 1950 Metabolites in Frozen Human Plasma
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SRM 1950 Metabolites in Frozen Human Plasma - This Standard Reference Material (SRM) is intended primarily for validation of methods for determining metabolites such as fatty acids, electrolytes, vitamins, hormones, and amino acids in human plasma and similar materials. This SRM can also be used for comparison of measurement technologies used in metabolomic studies and for quality assurance when assigning values to in-house reference materials. This SRM is intended to represent "normal" human plasma. A unit of SRM 1950 consists of five vials, each containing approximately 1.0 mL of plasma. This data is public in the Certificate of Analysis for this material.
SRM 3949 Folate Vitamers in Frozen Human Serum
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Standard Reference Material 3949 Folate Vitamers in Frozen Human Serum
SRM 2387 Peanut Butter
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SRM 2387 Peanut Butter - This Standard Reference Material (SRM) is intended primarily for use in validating methods for determining proximates, fatty acids, calories, vitamins, elements, amino acids, aflatoxins, and acrylamide in peanut butter and similar matrices. This SRM can also be used for quality assurance when assigning values to in-house reference materials. The SRM is a creamy peanut butter prepared by a manufacturer of peanut butter products. A unit of SRM 2387 consists of three jars of peanut butter containing 170 g each. This data is public in the Certificate of Analysis for this material.
SRM 3532 Calcium-Containing Solid Oral Dosage Form
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SRM 3532 Calcium-Containing Solid Oral Dosage Form - This Standard Reference Material (SRM) is intended primarily for validation of methods for determining cholecalciferol (vitamin D3) and elements in a calcium dietary supplement and similar materials. This SRM can also be used for quality assurance when assigning values to in-house reference materials. A unit of SRM 3532 consists of five packets, each containing approximately 10 g of material. This data is public in the Certificate of Analysis for this material.
SRM 3235 Soy Milk
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SRM 3235 Soy Milk - This Standard Reference Material (SRM) is intended primarily for validation of methods for determining vitamins, elements, proximates, fatty acids, and amino acids in soy milk and similar materials. This SRM can also be used for quality assurance when assigning values to in-house reference materials. The SRM is a soy milk prepared by a commercial manufacturer. A unit of SRM 3235 consists of 10 ampoules, each containing approximately 10 mL of material. This data is public in the Certificate of Analysis for this material.
SRM 1546a Meat Homogenate
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SRM 1546a Meat Homogenate - This Standard Reference Material (SRM) is intended primarily for validation of methods for determining fatty acids, cholesterol, proximates, calories, elements, vitamins, and amino acids in canned meat products and similar materials. This SRM can also be used for quality assurance when assigning values to in-house reference materials. The meat homogenate is a mixture of pork and chicken products blended together in a commercial process. A unit of SRM 1546a consists of four cans, each containing approximately 85 g of material. This data is public in the Certificate of Analysis for this material.
SRM 2384 Baking Chocolate
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SRM 2384 Baking Chocolate - This Standard Reference Material (SRM) is intended primarily for use in validating methods for determining proximates, fatty acids, calories, vitamins, elements, catechins, caffeine, and theobromine in baking chocolate and similar matrices. This SRM can also be used for quality assurance when assigning values to in-house reference materials. The SRM is baking chocolate prepared from 100 % cocoa beans by a manufacturer of baking chocolate and consists of a single production lot. A unit of SRM 2384 consists of five 91 g (3.2 oz) individually wrapped bars of baking chocolate. This data is public in the Certificate of Analysis for this material.
SRM 3290 Dry Cat Food
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SRM 3290 Dry Cat Food - This Standard Reference Material (SRM) is intended primarily for use in validating methods for determining proximates, fatty acids, vitamins, elements, and amino acids in dry cat food and similar matrices. This SRM can also be used for quality assurance when assigning values to in-house control materials. This SRM is a blend of commercially available dry cat foods. A unit of SRM 3290 consists of five heat-sealed, aluminized pouches, each containing approximately 10 g of material. This data is public in the Certificate of Analysis for this material.
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