کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
727651 892771 2011 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Comparison of the extrapolation precision of sequential and conventional standard addition calibrations
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی کنترل و سیستم های مهندسی
پیش نمایش صفحه اول مقاله
Comparison of the extrapolation precision of sequential and conventional standard addition calibrations
چکیده انگلیسی

The precision of extrapolation for comparable cases of sequential standard addition calibration (S-SAC) and conventional standard addition calibration (C-SAC) are compared for various ratios of target analyte concentration and solution mass of the unknown solution to the standard solution. In addition the difference between homoscedastic and heteroscedastic analyser behaviour has been assessed. Whilst the precision of C-SAC is superior under most practical conditions it is not significant until the concentration of target analyte in the standard solution is less than ten times that of the unknown. The difference in extrapolation precision between C-SAC and S-SAC shows very little dependence on whether analyser behaviour is homoscedastic or heteroscedastic, or on the mass ratio of the unknown solution to the standard solution.


► Extrapolation precisions for different standard addition calibrations are compared.
► The differences between homoscedastic and heteroscedastic behaviour are assessed.
► Relatively small differences are observed for most practical situations.
► Differences observed show little dependence on the parameters investigated.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Measurement - Volume 44, Issue 8, October 2011, Pages 1487–1490
نویسندگان
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