Study of Accuracy in Chemical Analysis Using Linear Calibration Curves

Abstract

It can be more easily detected in quantitative fashion by observing the 511-k.e.v. annihilation quanta produced when the positron and a free electron mutually annihilate. To simplify the determination of the counting geometry, it is necessary to ensure that all positrons are stopped in the immediate vicinity of the source.Niteogen -14(d, «)Oxygen-15. The nuclide oxygen-15 has an inconveniently short life of 2.1 minutes. In order to get a reproducible counting rate of oxygen-15 from a given nitrogen sample, the deuteron beam must not vary appreciably in intensity. As this is sometimes difficult to achieve with a'Van de Graaff, another reliable means of obtaining reproducibility has been used. The charge on the capacitor in the beam current integrator is caused to decay at the same rate (through a leak resistor) as the nuclide under investigation. Thus a

Kinetic Spectrophotometric Determination of Famotidine in Commercial Dosage Forms

“…5) at the 95% confidence level following the method of Mandel and Linnig. 22 It is evident from the figure that the point for which the intercept is zero fell well within the ellipse, thus confirming no significant difference from zero. The validity of the proposed methods was tested by adding a fixed amount of pure drug to preanalyzed dosage forms.…”

Development of a Rapid Process Monitoring Method for Dry-Coated Tableting Process by Using Near-Infrared Spectroscopy

“…20) Because the point (0, 1) lay inside the EJCR (at a confidence level of pϭ0.05) as shown in Fig. 7, it could be concluded that proportional and constant biases were absent, and thus the final calibration model showed good linearity.…”

A new spectrofluorimetric approach for the quantitation of imipramine HCl in commercial dosage forms

“…The value of t-were found to be 1.81 and 1.78 for Ideally the true relation between found and added concentration will provide straight line passing through the origin (intercept 0) with a slope equal to unity [31].…”