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Accreditation and Quality Assurance: Journal for Quality, Comparability and Reliability in Chemical Measurement (v.11, #4)
The International Symposium on Metrology in Chemistry, Beijing, October 10–18, 2004
by Yu Yadong (pp. 160-161).
The International Symposium on Metrology in Chemistry, Beijing, October 10–18, 2004
by Yu Yadong (pp. 160-161).
Metrology in chemistry: Rapid developments in the global metrological infrastructure, the CIPM MRA and its economic and social impact by Robert Kaarls (pp. 162-171).
Over the last decade, significant developments in metrology in chemistry have been observed, triggered by rapidly increasing demands by industry, trade, society, regulators, and accreditation bodies. Internal markets like the European Union, and trade agreements, like those agreed between the EU and the United States, Australia, Japan, and others will only really work when technical barriers to trade caused by non-harmonized measurement and testing systems and lack of international recognition of national measurement standards and certificates issued by the National Metrology Institutes have been taken away. Food safety test results and nutritional values, clinical and environmental measurements have to be comparable and reliable worldwide. Food products from all continents are traded year round on a global basis. Individuals are traveling everywhere. The environment and climate influences all of us.
Metrology in chemistry: Rapid developments in the global metrological infrastructure, the CIPM MRA and its economic and social impact by Robert Kaarls (pp. 162-171).
Over the last decade, significant developments in metrology in chemistry have been observed, triggered by rapidly increasing demands by industry, trade, society, regulators, and accreditation bodies. Internal markets like the European Union, and trade agreements, like those agreed between the EU and the United States, Australia, Japan, and others will only really work when technical barriers to trade caused by non-harmonized measurement and testing systems and lack of international recognition of national measurement standards and certificates issued by the National Metrology Institutes have been taken away. Food safety test results and nutritional values, clinical and environmental measurements have to be comparable and reliable worldwide. Food products from all continents are traded year round on a global basis. Individuals are traveling everywhere. The environment and climate influences all of us.
The role of metrology in chemistry in the upholding of public health and food safety in Hong Kong by Tai-Lun Ting; Della Wai-Mei Sin; Clare Ho; Wai-Cheung Chung (pp. 172-174).
The Government Laboratory has been involved in the provision of analytical and advisory services since its formal establishment in 1913 in support of the needs of the community and the commitments of the Government of Hong Kong Special Administrative Region, China. One of the earliest areas of work involves the testing of food samples for maintenance of public health and food safety. Remarkable advances in technology in recent years coupled with the introduction of new policies and regulations, the launching of new international standards and requirements have all contributed to significant and ever-rising demand of accurate, specific, comparable and traceable measurements using the latest technologies for a wide variety of additives, contaminants, residues and genetically modified ingredients in food.Metrology, the science of measurement, has always played a key role in the development and validation of analytical methodologies in the Government Laboratory for the realization of its measurements to the highest level of accuracies and traceability to internationally recognized standards. Besides the application of the latest analytical technologies such as isotope dilution mass spectrometry, tandem mass spectrometry, real-time polymerase chain reactions, etc., the Analytical and Advisory Services Division of the Laboratory develops a quality assurance system in full compliance with the requirements of ISO/IEC 17025 and endeavours to ensure that every analytical methods are validated with the best applicable means and are fit for the intended purposes. In this presentation, the role and application of metrology in chemistry in the measurements pertaining to public health and food safety work undertaken by the Government Laboratory are discussed.
Keywords: Metrology in chemistry; Method validation and development; Public health and safety
The role of metrology in chemistry in the upholding of public health and food safety in Hong Kong by Tai-Lun Ting; Della Wai-Mei Sin; Clare Ho; Wai-Cheung Chung (pp. 172-174).
The Government Laboratory has been involved in the provision of analytical and advisory services since its formal establishment in 1913 in support of the needs of the community and the commitments of the Government of Hong Kong Special Administrative Region, China. One of the earliest areas of work involves the testing of food samples for maintenance of public health and food safety. Remarkable advances in technology in recent years coupled with the introduction of new policies and regulations, the launching of new international standards and requirements have all contributed to significant and ever-rising demand of accurate, specific, comparable and traceable measurements using the latest technologies for a wide variety of additives, contaminants, residues and genetically modified ingredients in food.Metrology, the science of measurement, has always played a key role in the development and validation of analytical methodologies in the Government Laboratory for the realization of its measurements to the highest level of accuracies and traceability to internationally recognized standards. Besides the application of the latest analytical technologies such as isotope dilution mass spectrometry, tandem mass spectrometry, real-time polymerase chain reactions, etc., the Analytical and Advisory Services Division of the Laboratory develops a quality assurance system in full compliance with the requirements of ISO/IEC 17025 and endeavours to ensure that every analytical methods are validated with the best applicable means and are fit for the intended purposes. In this presentation, the role and application of metrology in chemistry in the measurements pertaining to public health and food safety work undertaken by the Government Laboratory are discussed.
Keywords: Metrology in chemistry; Method validation and development; Public health and safety
The metrological infrastructure for gas analysis by Ed W. B. de Leer (pp. 175-181).
This presentation to the Metrology in Chemistry symposium held in October 2004 in Beijing, describes the metrological infrastructure for gas analysis. The inputs from National Metrology Institutes, industry, standardisation and accreditation bodies, and organisers of proficiency testing schemes are briefly described.
Keywords: Gas analysis; metrology; CCQM
The metrological infrastructure for gas analysis by Ed W. B. de Leer (pp. 175-181).
This presentation to the Metrology in Chemistry symposium held in October 2004 in Beijing, describes the metrological infrastructure for gas analysis. The inputs from National Metrology Institutes, industry, standardisation and accreditation bodies, and organisers of proficiency testing schemes are briefly described.
Keywords: Gas analysis; metrology; CCQM
The application of isotope dilution thermal ionization mass spectrometry to traceability of chemical measurement and interlaboratory comparisons by Jun Wang; Motain Zhao; Na Guan; Hai Lu (pp. 188-194).
In this work, the method of isotope dilution thermal ionization mass spectrometry able to trace to SI was developed to accurately measure trace amount of Cd, Pb, Zn and Cu in sediment, rice, wine, and human serum samples for interlaboratory comparisons. The research focuses on how to apply the primary method correctly, uncertainty evaluation of measurement results, and how to achieve the meaning of traceability to SI by using ID-TIMS. As a result, the measurement results of Cu and Zn in the human serum 1 and 2 with 0.94, 0.83 and 0.49% combined uncertainty, respectively, were accepted by EC-JRC-IRMM as the certified values of the serum samples. The measurement results of Cd and Pb in CCQM-K13 and CCQM-K24 with 3.96, 1.62 and 1.03% combined uncertainty, respectively, are within the degrees of the equivalence. These comparisons at the highest level of measurement are proof that traceability of chemical measurement can be achieved as the traceability chain of ID-TIMS established in this work was used.
Keywords: Isotope dilution; Thermal ionization mass spectrometry; Traceability; Interlaboratory comparison; Cadmium; Lead; Zinc; Copper; Rice; Sediment; Serum
The application of isotope dilution thermal ionization mass spectrometry to traceability of chemical measurement and interlaboratory comparisons by Jun Wang; Motain Zhao; Na Guan; Hai Lu (pp. 188-194).
In this work, the method of isotope dilution thermal ionization mass spectrometry able to trace to SI was developed to accurately measure trace amount of Cd, Pb, Zn and Cu in sediment, rice, wine, and human serum samples for interlaboratory comparisons. The research focuses on how to apply the primary method correctly, uncertainty evaluation of measurement results, and how to achieve the meaning of traceability to SI by using ID-TIMS. As a result, the measurement results of Cu and Zn in the human serum 1 and 2 with 0.94, 0.83 and 0.49% combined uncertainty, respectively, were accepted by EC-JRC-IRMM as the certified values of the serum samples. The measurement results of Cd and Pb in CCQM-K13 and CCQM-K24 with 3.96, 1.62 and 1.03% combined uncertainty, respectively, are within the degrees of the equivalence. These comparisons at the highest level of measurement are proof that traceability of chemical measurement can be achieved as the traceability chain of ID-TIMS established in this work was used.
Keywords: Isotope dilution; Thermal ionization mass spectrometry; Traceability; Interlaboratory comparison; Cadmium; Lead; Zinc; Copper; Rice; Sediment; Serum
Application of the IDMS curve method to analytical measurement
by Martin J. T. Milton; Jian Wang (pp. 195-198).
Application of the IDMS curve method to analytical measurement
by Martin J. T. Milton; Jian Wang (pp. 195-198).
Analytical methods of dinitrogen-monoxide in high-purity nitrogen-monoxide CRM: effect of matrix mismatching between reference gas mixture and sample gas, and, long-term stability
by Nobuhiro Matsumoto; Takuro Watanabe; Kenji Kato (pp. 199-204).
Analytical methods of dinitrogen-monoxide in high-purity nitrogen-monoxide CRM: effect of matrix mismatching between reference gas mixture and sample gas, and, long-term stability
by Nobuhiro Matsumoto; Takuro Watanabe; Kenji Kato (pp. 199-204).
Preparation of calibration gas mixtures of water and nitrogen by using diffusion tubes by Zeyi Zhou; Liangjing Gai (pp. 205-207).
A new type apparatus of computer control dynamic volumetric method was designed in corresponded with ISO 6145-8. It will be useful to solve the problem of pressure variety above the diffusion tube and its effects to the diffusion rate. The calibration gas mixtures of water in nitrogen in the ranges of 10−7∼10−6 mol/mol were prepared by this method with the relative uncertainty smaller than 5%.
Keywords: Dynamic volumetric method; Computer control; Water diffusion tube
Preparation of calibration gas mixtures of water and nitrogen by using diffusion tubes by Zeyi Zhou; Liangjing Gai (pp. 205-207).
A new type apparatus of computer control dynamic volumetric method was designed in corresponded with ISO 6145-8. It will be useful to solve the problem of pressure variety above the diffusion tube and its effects to the diffusion rate. The calibration gas mixtures of water in nitrogen in the ranges of 10−7∼10−6 mol/mol were prepared by this method with the relative uncertainty smaller than 5%.
Keywords: Dynamic volumetric method; Computer control; Water diffusion tube
The determination of lead by MD-HG-AFS in APMP-QM-P3 comparison
by Xiaohua Lu; Hai Lu; Liandi Ma; Yanjie Cui (pp. 208-211).
The determination of lead by MD-HG-AFS in APMP-QM-P3 comparison
by Xiaohua Lu; Hai Lu; Liandi Ma; Yanjie Cui (pp. 208-211).