An inter-laboratory comparison study for the determination of copper and lead from the wastewater of printed circuit board manufacturing industry in Pakistan |
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Authors: | S S Tahir Rauf Naseem Anwar ul Haq Khalid Saeed |
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Institution: | (1) Environmental Analytical laboratory, Institution Pakistan Council of Scientific & Industrial Research, Islamabad, 44800, Pakistan |
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Abstract: | This inter-laboratory comparison study was arranged for 28 laboratories from different public and private sector organizations
in Pakistan having wastewater testing capabilities aimed at improving the quality and comparability of test results. This
national inter-laboratory study was started in December 2003 and completed in July 2004. Laboratories were invited to analyze
the wastewater collected from printed circuit board (PCB) industry for lead and copper contamination. The samples fulfill
the criteria for homogeneity and stability as done by the reference laboratory. The results obtained from participating laboratories
were analyzed in terms of Hampel Test for outliers, while the performance evaluation of the participating laboratories was
done on the basis of Z-score. An assigned value derived from the participant's results was compared with a reference value provided by a reference
laboratory. Overall >50% of the participating laboratories have shown good performance in this PT-program |
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Keywords: | Inter-laboratory comparison PCB manufacturing industry Copper Lead Outlier Uncertainty Pakistan |
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