scholarly journals Preparation of certified reference materials for cotton fabric’s dye transfer inhibition performance test of household washing machines

2020 ◽  
Vol 15 ◽  
pp. 155892502094116 ◽  
Author(s):  
Mingqi Guo ◽  
Yun He ◽  
Li Jiang ◽  
Qingbo Yang ◽  
Jianli Liu ◽  
...  
Keyword(s):  
Reference Material ◽  
Cotton Fabric ◽  
Reference Materials ◽  
Certified Reference Material ◽  
Performance Test ◽  
Certified Reference Materials ◽  
Dye Transfer ◽  
Washing Machines ◽  
Dyed Fabric ◽  
Transfer Inhibition

At present, many well-known brands of washing machines in the market are equipped with dye transfer inhibition washing procedures. However, there is no standardized sample available for the evaluation of the dye transfer inhibition washing procedure, and there is no comparability and access standard of the high-quality washing machine with the related functions. In this article, the certified reference materials for the evaluation of the dye transfer inhibition function will be prepared, which consist of certified reference material of white cotton fabric and that of dyed cotton fabric. The certified reference material of white fabric is made of bleached plain fabric, and that of dyed fabric is made with different reactive red dyes and dyeing processes. The size and manufacturing process of the whole set of standardized samples for the evaluation of dye transfer inhibition are selected and determined through experiments. The preparation of the standardized sample for the evaluation of dye transfer inhibition will improve the research and design of the functional washing procedure, which can better solve the pain point when dark and light clothes are washed together.

Experience with Certified Reference Material Proficiency Testing for Quality Control of Wheat

1998 ◽  
Vol 6 (A) ◽  
pp. A53-A61
Author(s):  
Judit Budai ◽  
Judit Fükó
Keyword(s):  
Quality Control ◽  
Reference Material ◽  
Proficiency Testing ◽  
Reference Materials ◽  
Certified Reference Material ◽  
Certified Reference Materials ◽  
Long Term Stability ◽  
Determining Factors ◽  
Chemical Section

The Chemical Section of OMH1,2 embarked on the preparation of a series of wheat samples as Certified Reference Materials (CRMs) in 1992. The certification processes were carried out according to the recommendations of ISO. Since then we have developed a series of flour samples as well. The investigations of the long-term stability and the application of wheat and flour CRMs are continuous. Wheat is one of the most widely grown crops in Hungary and it is one of the major determining factors of the economy. Its uniform and objective qualification is of great importance. There are well-equipped laboratories available with sufficient experience but, as the proficiency testing regularly showed, certified samples need to be used to achieve exact and uniform measuring results.

Development of a new tetrandrine certified reference material for clinical chemistry and pharmaceutical analysis

2015 ◽  
Vol 7 (11) ◽  
pp. 4763-4768 ◽  
Author(s):  
Dezhi Yang ◽  
Fengfeng Wang ◽  
Li Zhang ◽  
Yang Lv
Keyword(s):  
Reference Material ◽  
Reference Materials ◽  
Certified Reference Material ◽  
Pharmaceutical Analysis ◽  
Certified Reference Materials ◽  
Clinical Chemistry ◽  
Reliability And Validity ◽  
Metrological Characteristics ◽  
Analytical Measurements

Certified reference materials (CRMs) with good metrological characteristics are essential tools to guarantee the reliability and validity of analytical measurements.

scholarly journals Development and certification of a reference material for zearalenone in maize germ oil

2021 ◽  
Author(s):  
Juliane Riedel ◽  
Sebastian Recknagel ◽  
Diana Sassenroth ◽  
Tatjana Mauch ◽  
Sabine Buttler ◽  
...  
Keyword(s):  
Reference Material ◽  
Reference Materials ◽  
Mass Fraction ◽  
High Performance ◽  
Certified Reference Materials ◽  
Maximum Level ◽  
Whole Process ◽  
Commission Regulation ◽  
Maize Oil ◽  
Maize Germ

AbstractZearalenone (ZEN), an estrogenic mycotoxin produced by several species of Fusarium fungi, is a common contaminant of cereal-based food worldwide. Due to frequent occurrences associated with high levels of ZEN, maize oil is a particular source of exposure. Although a European maximum level for ZEN in maize oil exists according to Commission Regulation (EC) No. 1126/2007 along with a newly developed international standard method for analysis, certified reference materials (CRM) are still not available. To overcome this lack, the first CRM for the determination of ZEN in contaminated maize germ oil (ERM®-BC715) was developed in the frame of a European Reference Materials (ERM®) project according to the requirements of ISO Guide 35. The whole process of CRM development including preparation, homogeneity and stability studies, and value assignment is presented. The assignment of the certified mass fraction was based upon an in-house study using high-performance liquid chromatography isotope dilution tandem mass spectrometry. Simultaneously, to support the in-house certification study, an interlaboratory comparison study was conducted with 13 expert laboratories using different analytical methods. The certified mass fraction and expanded uncertainty (k = 2) of ERM®-BC715 (362 ± 22) μg kg−1 ZEN are traceable to the SI. This reference material is intended for analytical quality control and contributes to the improvement of consumer protection and food safety. Graphical abstract

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».

Developments of Environmentally Certified Reference Material From the Brazilian Metrology Institute to Support National Traceability

2019 ◽  
pp. 120-139
Author(s):  
Andreia de Lima Fioravante ◽  
Evelyn de Freitas Guimarães ◽  
Fabiano Barbieri Gonzaga ◽  
Cristiane Rodrigues Augusto ◽  
Claudia Cipriano Ribeiro ◽  
...  
Keyword(s):  
Reference Material ◽  
Reference Materials ◽  
Certified Reference Material ◽  
Great Part ◽  
Gas Mixtures ◽  
Environmental Demand ◽  
National Industry ◽  
Automotive Emission

This chapter aims to present the developments performed by the Brazilian Metrology Institute (NMI) – Inmetro, considering the environmental demand. Inmetro addresses a great part of its activities to the study of the traceability transference based on production and dissemination of certified reference material (CRM) of different areas in chemistry. The chapter presents results from certification of the following reference materials developed: BTEX and PAH in solution, besides automotive emission gas mixtures and bioethanol. So, the achievements made are the growth in developing CRM in order to support the needs of the national industry and to disseminate traceability among the society.

scholarly journals Global certified-reference-material- or reference-material-scaled nutrient gridded dataset GND13

2020 ◽  
Vol 12 (1) ◽  
pp. 487-499 ◽  
Author(s):  
Michio Aoyama
Keyword(s):  
Reference Material ◽  
Reference Materials ◽  
Certified Reference Materials ◽  
Global Ocean ◽  
Nutrient Concentrations ◽  
Correction Factors ◽  
Data Product ◽  
Gridded Dataset ◽  
Nutrient Analyses ◽  
Better Than

Abstract. A global nutrient gridded dataset that might be the basis for studies of more accurate spatial distributions of nutrients in the global ocean was created and named GND13. During 30 cruises, reference materials of nutrients in seawater or their equivalents were used at all stations, and high-precision measurements were made. The precision of the nutrient analyses was better than 0.2 %. Data were collected from the hydrographic cruises in the JASMTEC R/V Mirai cruises, JMA cruise, CARINA, PACIFICA, and WGHC datasets from which nutrient data were available. Analyses were conducted at 243 crossover stations. Cruises that used certified reference materials or reference materials (CRMs/RMs) for seawater nutrient concentration measurements were used as a reference of an unbroken chain of comparison to determine correction factors which made nutrient concentrations obtained by other cruises SI traceable. Dissolved oxygen was secondarily quality-controlled using the same methodology as was used to create the nutrient gridded data product, but, lacking a traceable standard, the resulting oxygen data product is not SI traceable. Finally, a dataset of nitrate, phosphate, and silicate concentrations was created at latitude and longitude intervals of 0.5∘ and on 136 isobaric surfaces to depths of 6500 m as an SI-traceable dataset. This dataset has already been published at: https://doi.org/10.17596/0000001 (Aoyama, 2017).

Developments of Environmental Certified Reference Material from the Brazilian Metrology Institute to Support National Traceability

2013 ◽  
Vol 3 (3) ◽  
pp. 1-17 ◽  
Author(s):  
A.L. Fioravante ◽  
E.F. Guimarães ◽  
F.B. Gonzaga ◽  
C.M. Ribeiro ◽  
S.P. Sobral ◽  
...  
Keyword(s):  
Reference Material ◽  
Reference Materials ◽  
Certified Reference Material ◽  
Great Part ◽  
Gas Mixtures ◽  
Environmental Demand ◽  
National Industry ◽  
Automotive Emission

This paper aims to present the developments performed by the Brazilian Metrology Institute (NMI) – Inmetro, considering the environmental demand. Inmetro addresses great part of its activities to the study of the traceability transference based on production and dissemination of certified reference material (CRM) of different areas in chemistry. It will be presented results from certification of the following reference materials developed: BTEX and PAH in solution, besides automotive emission gas mixtures and bioethanol. So, the achievements made are the growth in developing CRM, in order to support the needs of the national industry and to disseminate traceability among the society.

scholarly journals Optimization of dyeing parameters of cotton standardized samples for laundry test of dye transfer inhibition program

2020 ◽  
Vol 7 (1) ◽  
Author(s):  
Mingqi Guo ◽  
Li Jiang ◽  
Qingbo Yang ◽  
Chang Sun ◽  
Jianli Liu ◽  
...  
Keyword(s):  
Response Surface ◽  
Surface Analysis ◽  
Sodium Carbonate ◽  
Sodium Sulfate ◽  
Response Surface Analysis ◽  
Dye Transfer ◽  
Washing Machines ◽  
Washing Process ◽  
Dyeing Parameters ◽  
Transfer Inhibition

AbstractIn order to prevent light-colored clothes from being stained by dyes released from dark clothes during the washing process, some new-type washing machines have developed the dye transfer inhibition washing program. However, there is no certified reference materials for the test of dye transfer inhibition function. To this end, cotton fabric and reactive dyes are used as experimental materials to prepare standardized samples to evaluate the dye transfer inhibition function of washing machines. Firstly, the single factor analysis method is used to analyze the significance of the dyeing parameters including dye dosage, dyeing temperature, sodium sulfate dosage and sodium carbonate dosage. Secondly, a 4-factor 5-level experimental design and theoretical prediction of the best dyeing parameters are successively carried out through central composite design and response surface method. Two evaluation indicators, the dye release amount of the standardized sample of dyed fabric and the color difference value of the standardized sample of white fabric after washing, are proposed as the response values for response surface analysis to search the optimal dying parameters in theory. The optimal dyeing parameters obtained through response surface analysis are that the dosage of dye is 5.63% (owf), the dyeing temperature is 60 °C, the dosage of sodium sulfate is 93.60 g/L, and the dosage of sodium carbonate is 15 g/L. Experimental results indicate that the standardized samples prepared with optimal dyeing parameters can effectively distinguish the dye transfer inhibition function of washing machines.

Certified Reference Materials for the Characterisation of Multifunctional Materials

2005 ◽  
Vol 492-493 ◽  
pp. 635-640 ◽  
Author(s):  
Gert Roebben ◽  
Uwe Wätjen ◽  
Andrée Lamberty
Keyword(s):  
Quality Assurance ◽  
Reference Material ◽  
Reference Materials ◽  
Certified Reference Materials ◽  
Multifunctional Materials ◽  
Multifunctional Material ◽  
Minimum Sample Intake ◽  
Local Properties ◽  
Sample Intake ◽  
Material Producer

Multifunctional materials are created by intimately integrating different materials. The assessment of the local properties and composition of the different components of such a multifunctional material necessarily relies on techniques with sufficient spatial resolution. The increased use of these microanalysis or microprobe techniques has created a demand for appropriate quality assurance tools, such as reference materials. In this paper a number of issues related to the certification of reference materials for multifunctional materials are discussed. Examples of reference materials are shown to illustrate the particular challenges the reference material producer is faced with such as micro-homogeneity, minimum sample intake and stability.

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