Accreditation and Quality Assurance

http://link.springer.com/journal/769

List of Papers (Total 153)

Determination of the reference value of nitrogen mass fraction in the reference material of Polish soil

Ensuring a traceability and meaningful of a measurements is one of the most important stages of each analysis, each measurement. It is especially important for measurement of the environmental samples, like soil, which is a very complex matrix. A certified reference materials (CRMs) should be routinely used for this purpose. The paper discusses the procedure for preparation of the ...

ISO 15189-accredited laboratories fulfill the JCI Hospital Accreditation Standard requirements for the use of referral laboratories: report of a consensus meeting

Accreditation of healthcare services is recommended to ensure operation according to the highest quality standards. Various initiatives, such as legislation or accreditation by ISO or JCI, may be active to support and improve quality. The growing trend toward JCI hospital accreditation raised the concern of redundancy between JCI requirements for the use of referral laboratories ...

Further on creating normal density functions in Microsoft® Excel

Simulations play an increasing role in metrology and analytical chemistry, particularly the use of simulated normal distributions. Microsoft Excel is available to almost everybody and normal distributions can be simulated using either an innate function or other algorithms. We explore the success of five different algorithms to simulate normal distributions and compare the outcome ...

Probabilistic comparison and assessment of proficiency testing schemes and laboratories in the somatic cell count of raw milk

The somatic cell count (SCC) of milk is one of the main indicators of the udder health status of lactating mammals and is a hygiene criterion of raw milk used to manufacture dairy products. An increase in SCC is regarded as one of the primary indicators of inflammation of the mammary gland. Therefore, SCC is relevant in food legislation as well as in the payment of ex-farm raw milk ...

Is the assessment of interlaboratory comparison results for a small number of tests and limited number of participants reliable and rational?

Tests and/or test items can sometimes be expensive, unique, or only performed in a few laboratories. There can be cases where assigned values are unknown, there is no information, or only poor information on the probability density function attributed to the test result. Sometimes there are neither reference materials nor the ability to establish consensus values due to a lack of ...

Preparation and evaluation of sufficiently homogeneous and stable reference materials for priority hazardous substances in whole water

We have prepared and evaluated three whole water test materials containing eight polycyclic aromatic hydrocarbons (PAHs), six polybrominated diphenyl ethers (PBDEs) and tributyltin (TBT) with respect to homogeneity and short-term stability. The test materials were used as samples in two inter-laboratory comparisons. The materials were composed of natural mineral water and model ...

Interaction of 15 priority substances for water monitoring at ng L−1 levels with glass, aluminium and fluorinated polyethylene bottles for the containment of water reference materials

Certified water reference materials are currently not available for most of the hydrophobic organic pollutants listed in the EU Water Framework Directive. To find the most suitable container type for subsequent reference material productions, feasibility studies for the preparation of waters with polycyclic aromatic hydrocarbons (PAHs), polybrominated diphenyl ethers (PBDEs) and ...

Results of the REIMEP-17 interlaboratory comparison for the measurement of the U and Pu amount content and isotope amount ratios in the synthetic dissolved spent nuclear fuel solution

Reliable measurements are needed for the verification measures of States’ declarations of their nuclear activities in line with international agreements and the EURATOM Treaty. Laboratories carrying out measurements of nuclear material need to follow stringent quality control concepts and are required to demonstrate their measurement capabilities on a regular and timely basis to ...

Validation of a GC–IDMS method for the metrologically traceable quantification of selected FAMEs in biodiesel

Current methods for the analysis of fatty acid methyl esters (FAMEs) in rapeseed oil-based biodiesel refer to operationally defined measurands, which is a practical solution for routine analysis. In this paper, a new method for the SI-traceable quantification of selected FAMEs in biodiesel and its validation are described. This method has the potential to be a reference method for ...

The question of homogeneity inside a chimney: application of ISO 13528 to stack emission proficiency tests

The Hessian Agency for the Environment and Geology (HLUG) in Kassel, Germany, offers stack emission proficiency tests (PTs) on an in-house-constructed emission simulation apparatus (ESA). The PTs include gaseous (organic and inorganic) and particulate matter (heavy-metal-doped dust) emissions. A unique challenge arises when ISO 13528 is applied to these PTs: While homogeneity of ...

Uncertainty from sample preparation in the laboratory on the example of various feeds

A way of uncertainty calculation from test sample preparation in the laboratory was presented on the example of feeds. The essence of the proposal lies in separating two components of results’ variability expressed as coefficient of variation CV p: analytical variability CV a (repeatability) and technical variability CV h corresponding with the inhomogeneity of a component. The law ...

“Degrees of equivalence” for chemical measurement capabilities: primary pH

The key comparison (KC) studies of the Consultative Committee for Amount of Substance—Metrology in Chemistry help ensure the reliability of chemical and biochemical measurements relevant to international trade and environmental-, health-, and safety-related decision making. The traditional final evaluation of each measurement result reported by a KC participant is a “degree of ...