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Determination of Method Uncertainty a Practical Example for the Analysis of Trihalomethanes in Drinking Water Using Purge & Trap Gc-ms
| Content Provider | Semantic Scholar |
|---|---|
| Author | Mrózek, Ewa |
| Copyright Year | 2009 |
| Abstract | Johannesburg water is responsible for the supply an d monitoring of drinking water supplied to the greater Johannesburg area. Part of this monitoring programme involves the determination of Trihalomethane (THM) levels and the comparison thereof against the limits stipulated in SANS 241. This paper demonstrates the approach used to determine the uncertainty of the a nalytical method associated with the determination of THM’s, at ug/L levels, in drin k g water using Purge and Trap (P&T) GC-MS. It indicates the five steps used name ly: 1. Specification of the method 2. Identifying the model 3. Identification of sources of uncertainty using the Ishikawa approach 4. Expanding and if needed combining the uncertainties of each of the chosen data sources 5. Combining the expanded uncertainties and expressing the final method uncertainty The paper also attempts an evaluation of the data o btained and recommends possible improvements, identified from the data obtained, wh ich could be implemented to improve the uncertainty of the analytical method. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.nla.org.za/conferences/2009/2009_papers/Papers/Tuesday,%2015%20September/T208%20-%20The%20evaluation%20of%20method%20uncertainty%20-%20a%20practical%20example.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
