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• W2045018927 endingPage "340" @default.
• W2045018927 startingPage "321" @default.
• W2045018927 abstract "As more chromatographers consider using the techniques of fast chromatography or capillary electrochromatography, the instrumentation problems of generating and measuring these very narrow peaks is re-appraised. In particular the general view that 20–30 samples per peak is sufficient data to measure a peak is shown to be true under limited circumstances. A reworking of numerical integration theory and calculation of the errors of Newton Cotes rules when applied to chromatographic peaks, shows that asymmetry creates more subtle mischief: as many as 350 samples/peak may be needed to achieve 0.1% accuracy. Specialist, low time constant units are required to generate narrow peaks and a new breed of fast sampling data processor is required to measure them. As peaks narrow, it is increasingly important that data processors help analysts to identify data under-sampling by reporting peak asymmetry, actual sampling frequency (as opposed to that initially programmed) and number of measured samples/peak as a combined validation diagnostic. Finally the article considers the lack of development of new deconvolution based data processors and points towards the lack of information inside flame ionisation and ultraviolet absorbance detectors. If new data processors were to become available for information rich detectors, their benefits: improved accuracy, precision and greater confidence in results, would have to be weighed against the costs of adopting them, re-working of analysis methods and retraining staff. Many production laboratories would find it uneconomical and would stay with the old methods." @default.
• W2045018927 created "2016-06-24" @default.
• W2045018927 creator A5039131767 @default.
• W2045018927 date "1999-05-01" @default.
• W2045018927 modified "2023-10-12" @default.
• W2045018927 title "Peak distortion, data sampling errors and the integrator in the measurement of very narrow chromatographic peaks" @default.
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• W2045018927 doi "https://doi.org/10.1016/s0021-9673(99)00299-x" @default.
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