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Estimation on the application of Reference Materials for PCBs Proficiency Testing from the transformer oil
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
2010, v.23 no.3, pp.247-254
https://doi.org/10.5806/AST.2010.23.3.247
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(2010). Estimation on the application of Reference Materials for PCBs Proficiency Testing from the transformer oil. Analytical Science and Technology, 23(3), 247-254, https://doi.org/10.5806/AST.2010.23.3.247
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Abstract
This study was carried out to produce Reference Materials (RMs) for Proficiency Testing (PT) of PCBs in waste analytical laboratories. Two RMs were prepared from used transformer oil samples and PCB free transformer oil by spiking PCBs standard solutions. The spiked PCB RMs were homogenized by mixing and settling up to 90 days. Homogenized concentration of PCBs with Arochlor 1254 (6 ppm), 1254:1260 (1:1) (5 ppm) were observed in 60 days stationary phase but Arochlor 1260 (3.5 mg/L) were observed in 90 days stationary phase. One-way ANOVA test were carried out and showed that the RMs were suitably homogenized, which can be used for proficiency testing. The Relative Standard Deviations (RSDs) of analytical results were 3.51~5.01% for the PCBs RMs in 10 replicates. The expanded uncertainty of PCBs analytical procedure were 0.26~0.49.
- keywords
- PCBs, uncertainty, RMs, PT
Reference
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