Topic
Calibration curve
About: Calibration curve is a research topic. Over the lifetime, 6552 publications have been published within this topic receiving 95128 citations.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this paper, it was shown that the ordinary polynomial is the preferred expression to fit flame AAS data and that it is possible to extend the calibration graph at least to the point where the slope is reduced to 25% of its value at the origin.
Abstract: The non-linear portion of the calibration graphs in flame atomic-absorption spectrometry (AAS) offers more precise analytical results provided that the calibration graph can be determined reliably. Experimental data for three elements (Cu, Ni, Pb) and synthetic data were submitted to nine analysts and to three mathematical expressions (polynomial, cubic spline and rational function). The quality of hand-drawn and computer-calculated graphs was judged for goodness of fit and the accuracy of determining unknowns. It is concluded that results within 1% can be obtained in either instance, provided that 5–8 selected reference solutions are used and weighting factors are applied in the least-squares fit. With a simple criterion to guide the selection of the correct degree, the ordinary polynomial is the preferred expression to fit flame AAS data. With these recommendations it is possible to extend the calibration graph at least to the point where the slope is reduced to 25% of its value at the origin.
28 citations
TL;DR: In this paper, generalized analytical solutions have been obtained for imperfect resolution when the molecular weight calibration curve is nonlinear and the variance of single-species chromatograms changes significantly with molecular size of the polymer solute.
Abstract: Herein is reported generalized analytical solutions which permit correction for imperfect resolution when the molecular weight calibration curve is nonlinear and the variance of single-species chromatograms changes significantly with molecular size of the polymer solute. Two kinds of generalized analytical solutions have been obtained. One is a solution of Tung's integral equation for the corrected chromatogram or the molecular weight distribution and the other is a solution for the corrected molecular weight averages of the whole polymer. Also discussed is the use of local corrections for imperfect resolution across the chromatogram with detectors such as the low angle laser light scattering spectrophotometer (LALLS) when used with micro and macropackings.
28 citations
TL;DR: Charged Aerosol Detection (CAD) was successfully used for a Non‐chromophoric aminoglycoside (Amikacin) and performance is nearly on par with that of the conventional UV absorbance detector.
28 citations
TL;DR: The UA-CPE method showed to be suitable for the extraction and determination of mercury species in certified reference materials and the results were in a good agreement with the certified values, and the relative standard deviation was lower than 3.2%.
28 citations
TL;DR: In this paper, a method for the determination of four volatile halohydrocarbons (CHCl3, CCl4, C2HCl3 and C2Cl4) in water is developed by combined continuous-flow liquid-phase microextraction (CFME) with gas chromatography microelectron capture detection (GC-μECD).
28 citations