scholarly journals KARAKTERISTISASI DAN UJI HOMOGENITAS KANDIDAT BAHAN ACUAN BUFER FTALAT DAN BUFER FOSFAT UNTUK PENGUKURAN DERAJAT KEASAMAN

2013 ◽  
Vol 15 (1) ◽  
pp. 9-14 ◽  
Author(s):  
Sujarwo Sujarwo ◽  
Nuryatini Nuryatini
Keyword(s):  
Everyday Life ◽  
Reference Materials ◽  
Confidence Level ◽  
Certified Reference Materials ◽  
Ph Measurement ◽  
Metrology In Chemistry ◽  
Food And Beverage ◽  
Materials Research ◽  
And Performance

Measurement of pH is closely related to everyday life,such as in the area of environment, food and beverage,pharmaceuticals, and even metabolism process in humanbody. To ensure the quality of pH measurement, pH metershould be calibrated regularly and checked each time beforeused. Calibration and performance checking of pH meterrequires traceable standard. The standard should be linked toCRM (Certified Reference Materials). Research Center forChemistry - Indonesian Institute of Sciencesas the technicallaboratory in Indonesia for metrology in chemistry isconducting research in developing reference materials for pHmeasurement. The reference materials are phthalate andphosphate buffer withthe value of pH were 4.00±O.OJ and6.86±O. OJ, respectively at 95% confidence level (k=2).Homogenity study was evaluated based on F-test and theresults indicated that both reference materials candidate werehomogeneous.Keywords: Reference materials, CRM,phthalate buffer,phosphatebuffer,uncertainty,homogeneity.

scholarly journals The problem of improving the quality of seriously issued certified reference materials of the composition of gas mixtures

2019 ◽  
Vol 15 (3) ◽  
pp. 5-13
Author(s):  
L. A. Konopelko ◽  
A. V. Kolobova ◽  
O. V. Fatina
Keyword(s):  
Reference Material ◽  
Reference Materials ◽  
Certified Reference Materials ◽  
Metrological Traceability ◽  
Gas Mixtures ◽  
Measuring Instruments ◽  
Expanded Uncertainty ◽  
Iso Guide 35 ◽  
The Russian Federation

Currently, in the Russian Federation, the metrological traceability of certified reference materials of the composition of gas mixtures in cylinders under pressure produced by manufacturers of certified reference materials is carried out in accordance with GOST 8.578-2014. Considering that certified reference materials of the composition of gas mixtures in cylinders under pressure are used for testing to approye the type of measuring instruments, verification, calibration, and graduation of gas-analytical measuring instruments used to control explosive gases and vapors, harmful components in the atmospheric air and the air of the working area, emissions from vehicles and enterprises, to control technological processes, the quality of hydrocarbon products, etc., the issue of ensuring the quality of seriously produced certified reference materials (about 100.000 cylinders with gas mixtures per year) is important. To ensure the quality of certified reference materials of gas mixtures in cylinders under pressure, mass-produced by manufacturers of certified reference materials, we offer the following actions:– manufacturers of certified reference materials’ passing of mandatory accreditation for compliance with the requirements of GOST ISO Guide 34–2014 and GOST ISO Guide 35–2015;– manufacturers of certified reference materials’ constant participation in the proficiency testing programs through interlaboratory tests;– actualizing and refining the existing set of standards defining the requirements for the entire life cycle of a certified reference material of a gas mixture in a cylinder under pressure;– improving the method of certification of a reference material by calculating the value of the expanded uncertainty of the reference material and the introducting a new coefficient «technological reserve».

Development, validation, and certification by isotope dilution gas chromatography-mass spectrometry of lyophilized human serum reference materials for cortisol (CRM 192 and 193) and progesterone (CRM 347 and 348)

1991 ◽  
Vol 37 (4) ◽  
pp. 540-546 ◽  
Author(s):  
Linda Thienpont ◽  
Lothar Siekmann ◽  
Alexander Lawson ◽  
Elisabeth Colinet ◽  
Andrȳ De Leenheer
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Reference Materials ◽  
Isotope Dilution ◽  
Certified Reference Materials ◽  
Collaborative Study ◽  
Gas Chromatography Mass Spectrometry ◽  
Chromatography Mass Spectrometry ◽  
Coefficients Of Variation

Abstract The Community Bureau of Reference of the European Communities has produced four batches of lyophilized serum Certified Reference Materials, two for cortisol (CRM 192 and 193) and two for progesterone (CRM 347 and 348). For cortisol, one of the pools consisted of serum from healthy blood donors, whereas the second batch was supplemented with pure cortisol. The progesterone Reference Materials contained only endogenous hormone concentrations. Assessment of vial-to-vial variability in the cortisol and progesterone concentrations showed no between-sample inhomogeneity, and the materials were stable. The quality of the materials was therefore considered sufficient for certification of the values for the cortisol and progesterone concentrations by a collaborative study involving several laboratories from the European Communities, using isotope dilution gas chromatography-mass spectrometry. Inaccuracy in reconstitution of the lyophilized materials was less than 0.3%; imprecision of sampling was less than 0.2%. For determinations of cortisol and progesterone concentrations, the mean within-laboratory coefficients of variation (CVs) were 1.76% (CRM 192), 1.19% (CRM 193), 1.64% (CRM 347), and 1.75% (CRM 348). The between-laboratory CVs were greater: CRM 192, 1.79%; CRM 193, 1.48%; CRM 347, 2.08%; and CRM 348, 2.16%. The concentrations in the reconstituted Reference Materials were certified to be 273 nmol/L in CRM 192 and 763 nmol/L in CRM 193 for cortisol and 10.13 nmol/L in CRM 347 and 40.3 nmol/L in CRM 348 for progesterone. Uncertainties at the 0.95 confidence level--6 (CRM 192), 14 (CRM 193), 0.21 (CRM 347), and 1.0 nmol/L (CRM 348)--were considered compatible with the intended use of the materials.

scholarly journals Quality Assurance of Analytical Measurements—A Vital Element in Safety Performance in the Nuclear Field

Proceedings ◽  
2020 ◽  
Vol 55 (1) ◽  
pp. 2
Author(s):  
Elena Neacsu
Keyword(s):  
Quality Assurance ◽  
Reference Materials ◽  
Certified Reference Materials ◽  
Analytical Data ◽  
Physical Principle ◽  
Energy Agency ◽  
Nuclear Domain ◽  
Analyte Detection ◽  
Harmful Effects

The (International Atomic Energy Agency) IAEA’s fundamental safety objective is to protect people and the environment from harmful effects of ionizing radiation. The safety principles apply to all facilities and all activities to reduce existing radiation risks. Analytical quality assurance has gained in importance in many scientific areas, including the analysis of radioactive specimens that require a thorough investigation and regulations for safety and ecological reasons. The use of certified reference materials is an essential pillar for the assessment of the quality of analytical data. Still, such matrix-matched certified reference materials are unfortunately not available for most investigations relevant to the nuclear domain. Therefore, other strategies have to be established, i.e., to compare the analytical results obtained for a particular instrumental technique, with data from another methodology whose analyte detection is based on a different physical principle.

scholarly journals Penerapan Sistem Menu Engineering Dalam Upaya Peningkatan Kualitas Menu di Restoran Bintan Inti Executive Village Clubhouse

2021 ◽  
Vol 5 (1) ◽  
pp. 60
Author(s):  
Adiguna Tumpuan
Keyword(s):  
Production Costs ◽  
Engineering System ◽  
Contribution Margin ◽  
Analysis And Evaluation ◽  
Food And Beverage ◽  
Menu Analysis ◽  
And Performance ◽  
Suggestive Selling

This research is a form of analysis and evaluation of the menu at the Bintan Inti Executive Village (BIEV) Clubhouse through a menu engineering system with the aim of improving the quality and effectiveness of the menu served. The formulation of the problem which is the basis of this research is how to improve the quality of the food and beverage menu through the menu engineering system and what recommendation actions should be taken based on the resulting data from the analysis that appears. This study uses variables, which are menu analysis in improving the quality of the menu at BIEV Clubhouse with sub variables, such as food cost, menu mix, and contribution margin. The results of this study that there were 8 menus or 30.77% menus with star categories, 5 menus or 19.23% menus with the plowhorse category, 4 menus or 15.38% menus with the puzzle category, and 9 menus or 34.62%. menu with dog category. The recommended follow-up actions to BIEV Clubhouse management is reducing the menu with the dog category, evaluating product prices and production costs for menus with the plowhorse category, taking suggestive selling steps for menus with the puzzle category, and maintaining the quality and performance of menus with the star category.

An Evaluation of Social Responsibility Reporting in China

2010 ◽  
Vol 2 (1) ◽  
pp. 101-128 ◽  
Author(s):  
Xu Longhua ◽  
Zhao Yi ◽  
Xu Xinyu
Keyword(s):  
Corporate Social Responsibility ◽  
Social Responsibility ◽  
Indicator System ◽  
Data Availability ◽  
The Past ◽  
Food And Beverage ◽  
Quality Of Reports ◽  
And Performance ◽  
Corporate Social

AbstractIn the past two years, the issuance of corporate social responsibility (CSR) reports has become an important nonprofit practice of enterprises in China. As of April 2008, over eighty enterprises in China in industries such as biochemical and energy, food and beverage, computers, finance and insurance, and automotive had released CSR (or equivalent) reports. Using SustainAbility’s indicator system, the paper evaluates CSR reports issued by enterprises in China between May 2007 and April 2008. The paper finds reports’ descriptions of management and performance to be quite good, but that reports failed to give enough information about governance and strategy, data availability, audits, and other aspects. Furthermore, we discovered that the current indicator system, while able to evaluate the quality of reports in form, falls short of truly evaluating their contents. Thus, a new indicator system must be devised to allow an overall assessment of the content of reports.

scholarly journals Pengaruh Psychological Capital dan Kepuasan Kerja terhadap Kinerja Karyawan yang Dimediasi oleh Work Engagement pada Karyawan Kantor Pusat PT BG

2021 ◽  
Vol 5 (6) ◽  
pp. 599
Author(s):  
Kevin Jonathan ◽  
Rezi Erdiansyah
Keyword(s):  
Job Satisfaction ◽  
Human Resources ◽  
Work Engagement ◽  
Psychological Capital ◽  
Employee Performance ◽  
The West ◽  
Positive Direction ◽  
Food And Beverage ◽  
And Performance

In the era of globalization that is continuously developing, organizations are required to be able to adapt themselves more quickly to changes and challenges that occur. These changes can be in various ways that directly or indirectly affect the survival and performance of the organization in general. To be able to compete globally, organizations need to be supported by superior human resources in terms of job satisfaction, psychological capital, work engagement, as well as performance. One of the companies in the food and beverage sector that have been established since 1960, namely PT BG is a family company that initially only had one store in the West Jakarta area and to date has 60 stores spread across Jabodetabek, Karawang, Cikarang, Surabaya, and Bali. To improve the quality of these products and services, it is necessary to be supported by a professional, competent workforce who also has good performance to support the achievement of the company's business. Data obtained from questionnaires were distributed via a google form. The sample used in this study was 132 respondents with the help of SmartPLS software. The results showed that work engagement mediated the effect of psychological capital on employee performance in a positive direction and work engagement mediated the effect of job satisfaction on employee performance in a positive direction. Di era globalisasi yang terus menerus berkembang ini, organisasi dituntut untuk dapat lebih cepat dalam menyesuaikan diri terhadap perubahan-perubahan maupun tantangan-tantangan yang terjadi. Perubahan-perubahan tersebut bisa dalam berbagai hal yang secara langsung maupun tidak langsung berdampak pada kelangsungan hidup maupun kinerja organisasi secara umum. Untuk dapat tepat bersaing secara global, organisasi perlu didukung oleh sumber daya manusia yang unggul dari segi kepuasan kerja, psychological capital, work engagement, maupun kinerja yang handal. Salah satu perusahaan di bidang makanan dan minuman yang telah berdiri sejak tahun 1960, yaitu PT BG merupakan perusahaan keluarga yang pada awalnya hanya memiliki satu store yang terdapat di daerah Jakarta Barat dan sampai pada saat ini telah memiliki 60 store yang tersebar di Jabodetabek, Karawang, Cikarang, Surabaya, dan Bali. Tentu untuk meningkatkan kualitas produk dan layanan tersebut perlu didukung oleh tenaga kerja yang profesional, kompeten, dan juga memiliki performa yang baik untuk menunjang pencapaian bisnis perusahaan. Data diperoleh dari kuesioner yang disebar melalui google form. Sampel yang digunakan dalam penelitian ini sebanyak 132 responden dengan bantuan software SmartPLS. Hasil penelitian menunjukkan bahwa work engagement memediasi pengaruh psychological capital terhadap kinerja karyawan dengan arah yang positif dan work engagement memediasi pengaruh kepuasan kerja terhadap kinerja karyawan dengan arah yang positif.

Development of reference materials with the composition of propyl and isopropyl alcohol solutions

2020 ◽  
pp. 66-72
Author(s):  
Irina A. Piterskikh ◽  
Svetlana V. Vikhrova ◽  
Nina G. Kovaleva ◽  
Tatyana O. Barynskaya
Keyword(s):  
Reference Materials ◽  
Measurement Errors ◽  
Isopropyl Alcohol ◽  
Certified Reference Materials ◽  
Toxic Substances ◽  
Biological Objects ◽  
Margin Of Error ◽  
Measurement Results ◽  
And Control ◽  
Characteristic Mass

Certified reference materials (CRM) composed of propyl (11383-2019) and isopropyl (11384-2019) alcohols solutions were created for validation of measurement procedures and control of measurement errors of measurement results of mass concentrations of toxic substances (alcohol) in biological objects (urine, blood) and water. Two ways of establishing the value of the certified characteristic – mass consentration of propanol-1 or propanol-2 have been studied. The results obtained by the preparation procedure and comparison with the standard are the same within the margin of error.

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