Recent developments in food-matrix Reference Materials at NIST

Sharpless, Katherine E.; Colbert, J. C.; Greenberg, Ronald I.; Schantz, Michele M.; Welch, Michael J.

doi:10.1007/s002160100826

Cited by 17 publications

(10 citation statements)

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“…Many of these naturalmatrix SRMs are also of interest to the food chemistry community in terms of measurements to support nutritional labeling requirements. Hence, some tissue-matrix SRMs from NIST are characterized for nutrient concentrations of proximates (fat, protein, carbohydrates, ash, and solids), individual fatty acids, and nutritive minerals and trace elements [8] as well as organic contaminants.…”

Section: Introductionmentioning

confidence: 99%

Determination of polychlorinated biphenyl congeners and chlorinated pesticides in a fish tissue standard reference material

et al. 2003

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The concentrations of a wide range of polychlorinated biphenyl congeners (PCBs) and chlorinated pesticides in a fish tissue Standard Reference Material (SRM) have been determined using multiple methods of analysis. This material, SRM 1946, Lake Superior Fish Tissue, was recently issued by the National Institute of Standards and Technology (NIST) and complements a suite of marine environmental natural-matrix SRMs that are currently available from NIST for the determination of organic contaminants such as aliphatic hydrocarbons, polycyclic aromatic hydrocarbons (PAHs), PCBs, and chlorinated pesticides. SRM 1946 is a fresh tissue homogenate (frozen) prepared from filleted adult lake trout (Salvelinus namaycush namaycush) collected from the Apostle Islands region of Lake Superior. SRM 1946 has certified and reference concentrations for PCB congeners, including the three non- ortho PCB congeners, and chlorinated pesticides. Certified concentrations are available for 30 PCB congeners and 15 chlorinated pesticides. Reference concentrations are available for 12 PCB congeners and 2 chlorinated pesticides. In addition, SRM 1946 is characterized for additional chemical constituents and properties: fatty acids, extractable fat, methylmercury, total mercury, selected trace elements, proximates, and caloric content. The characterization of chlorinated compounds is described in this paper with an emphasis on the approach used for the certification of the concentrations of PCB congeners and chlorinated pesticides. The PCB congener and chlorinated pesticide data are also compared to concentrations in other marine natural-matrix reference materials available from NIST (fish oil, mussel tissue, whale blubber, and a second fresh frozen fish tissue homogenate prepared from filleted adult lake trout collected from Lake Michigan) and from other organizations such as the National Research Council Canada (ground whole carp), the International Atomic Energy Agency (fish homogenate), and the European Commission Joint Research Centre [fish oils (cod and mackerel) and mussel tissue].

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Section: Introductionmentioning

confidence: 99%

Determination of polychlorinated biphenyl congeners and chlorinated pesticides in a fish tissue standard reference material

et al. 2003

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“…This process resulted in the identification of three categories of assigned values -certified, reference, and information values -and seven value assignment modes [6]. NIST has used several of the modes for assignment of analyte concentrations in the food-matrix reference materials, including the modes in which data provided by collaborating laboratories are used -either in conjunction with NIST data or alone [7]. The use of data provided by collaborating food industry and contract laboratories for the analysis of foodmatrix RMs has enabled NIST to provide assigned values for many analytes that NIST does not have the resources or analytical expertise to measure.…”

Section: Food-matrix Reference Materials and Their Assigned Valuesmentioning

confidence: 99%

Filling the AOAC triangle with food-matrix standard reference materials

Sharpless

Greenberg

Schantz

et al. 2004

Analytical and Bioanalytical Chemistry

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Well-characterized reference materials are needed by laboratories in the food testing and nutrition communities to facilitate compliance with nutritional labeling laws, to provide traceability for food exports needed for acceptance in many foreign markets, and to improve the accuracy of nutrition information that is provided to assist consumers in making sound dietary choices. As a result of the enactment of the Nutrition Labeling and Education Act of 1990 and the Infant Formula Act of 1980, the National Institute of Standards and Technology (NIST) has developed a suite of food-matrix Standard Reference Materials (SRMs) characterized for nutrient concentrations. These include SRM 1544 Fatty Acids and Cholesterol in a Frozen Diet Composite, SRM 1546 Meat Homogenate, SRM 1548a Typical Diet, SRM 1566b Oyster Tissue, SRM 1846 Infant Formula, SRM 1946 Lake Superior Fish Tissue, SRM 2383 Baby Food Composite, SRM 2384 Baking Chocolate, SRM 2385 Spinach, and SRM 2387 Peanut Butter. Many of these materials were developed at the request of the food industry to populate a nine-sectored fat-protein-carbohydrate triangle developed by AOAC International. With the completion of SRM 2387, SRMs representing each sector of the triangle are now available. These food-matrix reference materials are intended primarily for validation of analytical methods for the measurement of proximates, fatty acids, vitamins, minerals, and so on in foods of similar composition. They may also be used as "primary control materials" in the value-assignment of in-house, secondary, control materials to confirm accuracy as well as to establish traceability to NIST.

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“…Moreover, in 1997 the Certificate of Analysis for SRM 1974a was revised to include the methylmercury content [9]. In an effort to support nutritional labeling requirements, values of proximates (solids, ash, protein, and carbohydrates), calories, and fatty acids were added to the Certificate of Analysis in 1999 to provide the food chemistry community with an SRM that was characterized for nutrients [10]. Like its predecessor SRM 1974, SRM 1974a was widely used in marine monitoring and related quality assurance programs.…”

Section: Introductionmentioning

confidence: 99%

Three new mussel tissue standard reference materials (SRMs) for the determination of organic contaminants

Poster

Schantz

Kucklick

et al. 2004

Analytical and Bioanalytical Chemistry

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Three new mussel tissue standard reference materials (SRMs) have been developed by the National Institute of Standards and Technology (NIST) for the determination of the concentrations of organic contaminants. The most recently prepared material, SRM 1974b, is a fresh frozen tissue homogenate prepared from mussels ( Mytilus edulis) collected in Boston Harbor, Massachusetts. The other two materials, SRMs 2977 and 2978, are freeze-dried tissue homogenates prepared from mussels collected in Guanabara Bay, Brazil and Raritan Bay, New Jersey, respectively. All three new mussel tissue SRMs complement the current suite of marine natural-matrix SRMs available from NIST that are characterized for a wide range of contaminants (organic and inorganic). SRM 1974b has been developed to replace its predecessor SRM 1974a, Organics in Mussel Tissue, for which the supply is depleted. Similarly, SRMs 2977 and 2978 were developed to replace a previously available (supply depleted) freeze-dried version of SRM 1974a, SRM 2974, Organics in Freeze-Dried Mussel Tissue. SRM 1974b is the third in a series of fresh frozen mussel tissue homogenate SRMs prepared from mussels collected in Boston Harbor starting in 1988. SRM 1974b has certified concentration values for 22 polycyclic aromatic hydrocarbons (PAHs), 31 polychlorinated biphenyl congeners (PCBs), and 7 chlorinated pesticides. Reference values are provided for additional constituents: 16 PAHs, 8 PCBs plus total PCBs, 6 pesticides, total extractable organics, methylmercury, and 11 trace elements. PAH concentrations range from about 2 ng g(-1 )dry mass (cyclopenta[ cd]pyrene) to 180 ng g(-1 )dry mass (pyrene). PCB concentrations range from about 2 ng g(-1 )dry mass (PCB 157) to 120 ng g(-1 )dry mass (PCB 153). The reference value for total PCBs in SRM 1974b is (2020 +/- 420) ng g(-1 )dry mass. Pesticide concentrations range from about 4 ng g(-1 )dry mass (4,4'-DDT) to 40 ng g(-1 )dry mass (4,4'-DDE). SRM 2977 has certified values for 14 PAHs, 25 PCB congeners, 7 pesticides, 6 trace elements, and methylmercury. Reference values for 16 additional PAHs and 9 inorganic constituents are provided, and information values are given for 23 additional trace elements. SRM 2978 has certified and reference concentrations for 41 and 22 organic compounds, respectively, and contains contaminant levels similar to those of SRM 1974b. Organic contaminant levels in SRM 2977 (mussels from Guanabara Bay, Brazil) are typically a factor of 2 to 4 lower than those in SRM 1974b and SRM 2978. The organic contaminant concentrations in each new mussel tissue SRM are presented and compared in this paper. In addition, a chronological review of contaminant concentrations associated with mussels collected in Boston Harbor is discussed as well as a stability assessment of SRM 1974a.

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Recent developments in food-matrix Reference Materials at NIST

Cited by 17 publications

References 0 publications

Determination of polychlorinated biphenyl congeners and chlorinated pesticides in a fish tissue standard reference material

Determination of polychlorinated biphenyl congeners and chlorinated pesticides in a fish tissue standard reference material

Filling the AOAC triangle with food-matrix standard reference materials

Three new mussel tissue standard reference materials (SRMs) for the determination of organic contaminants

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