River sediment (S-37) - A new analytical quality control material ensuring comparability of chlorinated hydrocarbon analysis during an international environmental study in China

2000 ◽  
Vol 367 (3) ◽  
pp. 232-240 ◽  
Author(s):  
B. M. Gawlik ◽  
D. Martens ◽  
B. Henkelmann ◽  
K. W. Schramm ◽  
A. Kettrup ◽  
...  
Keyword(s):  
Quality Control ◽  
River Sediment ◽  
Environmental Study ◽  
Analytical Quality Control ◽  
Quality Control Material ◽  
Analytical Quality ◽  
Control Material ◽  
Chlorinated Hydrocarbon ◽  
Hydrocarbon Analysis

Internal quality control of prothrombin time in primary care: comparing the use of patient split samples with lyophilised control materials

2009 ◽  
Vol 102 (09) ◽  
pp. 593-600 ◽  
Author(s):  
Per Petersen ◽  
Una Sølvik ◽  
Sverre Sandberg ◽  
Anne Stavelin
Keyword(s):  
Primary Care ◽  
Quality Control ◽  
Prothrombin Time ◽  
Error Detection ◽  
Analytical Quality Control ◽  
Power Functions ◽  
Analytical Quality ◽  
Control Material ◽  
Probability Of Error ◽  
Split Sample

SummaryMany primary care laboratories use point-of-care (POC) instruments to monitor patients on anticoagulant treatment. The internal analytical quality control of these instruments is often assessed by analysing lyophilised control materials and/or by sending patient samples to a local hospital laboratory for comparison (split sample).The aim of this study was to evaluate the utility of these two models of prothrombin time quality control. The models were evaluated by power functions created by computer simulations based on empirical data from 18 primary care laboratories using the POC instruments Thrombotrack, CoaguChek S, or Hemochron Jr. Signature. The control rules 12S, 13S, exponential weighted moving average, and the deviation limits of ± 10% and ± 20% were evaluated by their probability of error detection and false rejections. The total within-lab coefficient of variation was 3.8% and 6.9% for Thrombotrack, 8.9% and 10.5% for CoaguChek S, and 9.4% and 14.8% for Hemochron Jr. Signature for the control sample measurements and the split sample measurements, respectively. The probability of error detection was higher using a lyophilised control material than a patient split sample for all three instruments, whereas the probability of false rejection was similar. A higher probability of error detection occurred when lyophilised control material was used compared with the patient split samples; therefore, lyophilised control material should be used for internal analytical quality control of prothrombin time in primary health care.

Quality control material containing hemoglobin for blood gas and pH measurement: Improvement of the stability of stroma-free hemoglobin solution

1987 ◽  
Vol 47 ◽  
pp. 83-92 ◽  
Author(s):  
R. Sprokholt ◽  
S. Van Ooik ◽  
R. A.M. Van Den Camp ◽  
B. N. Bouma ◽  
W. G. Zijlstra ◽  
...  
Keyword(s):  
Quality Control ◽  
Ph Measurement ◽  
Blood Gas ◽  
Quality Control Material ◽  
Free Hemoglobin ◽  
Hemoglobin Solution ◽  
Control Material ◽  
The Stability

Analytical Quality Control (AQC) For Monitoring Trace Metals in the Coastal and Estuarine Environment

1986 ◽  
Vol 18 (4-5) ◽  
pp. 35-41 ◽  
Author(s):  
M. J. Gardner ◽  
D T. E. Hunt ◽  
G. Topping
Keyword(s):  
Quality Control ◽  
Trace Metals ◽  
Marine Pollution ◽  
Pollution Monitoring ◽  
Research Centre ◽  
Analytical Quality Control ◽  
Analytical Quality ◽  
Management Group ◽  
Analytical Results ◽  
Saline Waters

It is widely recognised that, unless special steps are taken, analytical results from a group of laboratories engaged in a monitoring programme are likely to be of poor comparability. This in turn can prejudice the conclusions drawn from the results of monitoring. On the basis of previous studies, the problem is known to be particularly acute for measurements of trace metals in saline waters. Recognising the difficulty, the Marine Pollution Monitoring Management Group (MPMMG) and the Water Research centre (WRc) have organised a programme of Analytical Quality Control (AQC). This has the objective of ensuring that analytical results for filterable cadmium and mercury in saline waters, obtained by water industry and other relevant laboratories, are of adequate accuracy and comparability for their intended uses. WRc is to coordinate a series of tests, some involving distributions of standards and samples, which the participating laboratories undertake; this series of tests, the background to the approach and some of the results obtained to date are described here.

Importance of implementing an analytical quality control system in a core laboratory

2015 ◽  
Vol 30 (6) ◽  
pp. 302-309 ◽  
Author(s):  
F. Marques-Garcia ◽  
M.F. Garcia-Codesal ◽  
M.R. Caro-Narros ◽  
T. Contreras-SanFeliciano
Keyword(s):  
Quality Control ◽  
Control System ◽  
Quality Control System ◽  
Analytical Quality Control ◽  
Analytical Quality

Inadequate reporting of analytical quality control in the clinical pharmacological literature

1988 ◽  
Vol 34 (4) ◽  
pp. 319-321 ◽  
Author(s):  
R. H. Eggers ◽  
J. Bircher
Keyword(s):  
Quality Control ◽  
Analytical Quality Control ◽  
Analytical Quality

scholarly journals In situ Analytical Quality Control of chemotherapeutic solutions in infusion bags by Raman spectroscopy

Talanta ◽  
2021 ◽  
Vol 228 ◽  
pp. 122137
Author(s):  
Alaa A. Makki ◽  
Suha Elderderi ◽  
Victor Massot ◽  
Renaud Respaud ◽  
Hugh.J. Byrne ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Quality Control ◽  
Analytical Quality Control ◽  
Analytical Quality

scholarly journals Trends in the analytical quality control of the potable ethanol

2017 ◽  
Vol 21 (3) ◽  
pp. 180-196 ◽  
Author(s):  
O. B. Rudakov ◽  
S. Y. Nikitina
Keyword(s):  
Quality Control ◽  
Analytical Quality Control ◽  
Analytical Quality
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