期刊
ELECTROANALYSIS
卷 24, 期 2, 页码 316-324出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/elan.201100510
关键词
Ion-selective electrodes; Bayesian calibration; Limit of detection; Standard addition; Electrochemistry
资金
- New Zealand Royal Society [ISATA09-15]
- Ireland Environmental Protection Agency [2004-RS-AIC-M4]
- Science Foundation Ireland [07/CE/I1147, NAP210]
- Enterprise Ireland [07/RFP/MASF812]
- Science Foundation Ireland (SFI) [07/RFP/MASF812] Funding Source: Science Foundation Ireland (SFI)
- Environmental Protection Agency Ireland (EPA) [2004-RS-AIC-M4] Funding Source: Environmental Protection Agency Ireland (EPA)
With the increasing use of ion-selective electrodes in environmental and health applications, it is important to know the precision of estimated concentrations. A Bayesian model for non-linear calibration is introduced which provides estimates of measurement precision by incorporating uncertainty in calibration parameters and inherent random noise in emf response. The analysis of lead in 17 soil samples demonstrates that large gains in precision are possible when calibrations are extended to include multiple electrodes and standard addition data. The results highlight the need for improved calibration and routine use of standard addition as ion selective electrodes become increasingly popular for demanding, real world applications.
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