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JournalISSN: 0003-2654

Analyst 

Royal Society of Chemistry
About: Analyst is an academic journal published by Royal Society of Chemistry. The journal publishes majorly in the area(s): Detection limit & Mass spectrometry. It has an ISSN identifier of 0003-2654. Over the lifetime, 24309 publications have been published receiving 626219 citations.


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Journal ArticleDOI
01 Jan 1952-Analyst
TL;DR: In this article, the potential -volume curve obtained during potentiometric titrations shows only a small potential change at the end-point, and it has been customary to plot a deltaE/deltaV-volume curve and to take the peak of this curve as the equivalent point.
Abstract: When the potential - volume curve obtained during potentiometric titrations shows only a small potential change at the end-point, it has been customary to plot a deltaE/deltaV - volume curve and to take the peak of this curve as the equivalent point. In 1950, the author proposed a method of transforming these curves by a numerical manipulation into straight lines intersecting at the equivalence point. In this article another way of transforming titration curves into straight lines has now been developed. A simple theoretical treatment shows that the method can be applied to titrations involving acids and bases, ionic precipitations, formation of complexes, and oxidation - reduction reactions. To facilitate the use of the method a table has been compiled giving quantities to be calculated and plotted against volume of titrant added. These quantities can be evaluated by simple slide rule calculations and, since straight line relationships hold, end-points can be obtained by simple extrapolation. The practice of the method is applicable to potentiometers calibrated either in millivolts or in pH units, even when titrations other than acid - alkali reactions are in use.

2,757 citations

Journal ArticleDOI
01 Jan 1955-Analyst
TL;DR: A systematic review of the ninhydrin colour test for amino-acids is given in this article, with a note on its use in the identification of protein hydrolysates.
Abstract: A systematic review of the mechanism and application of the ninhydrin colour test for amino-acids, with a note on its use in the identification of protein hydrolysates. -- AATA

1,967 citations

Journal ArticleDOI
25 Jan 2010-Analyst
TL;DR: The increasing interest in Support Vector Machines (SVMs) over the past 15 years is described, including its application to multivariate calibration, and why it is useful when there are outliers and non-linearities.
Abstract: The increasing interest in Support Vector Machines (SVMs) over the past 15 years is described. Methods are illustrated using simulated case studies, and 4 experimental case studies, namely mass spectrometry for studying pollution, near infrared analysis of food, thermal analysis of polymers and UV/visible spectroscopy of polyaromatic hydrocarbons. The basis of SVMs as two-class classifiers is shown with extensive visualisation, including learning machines, kernels and penalty functions. The influence of the penalty error and radial basis function radius on the model is illustrated. Multiclass implementations including one vs. all, one vs. one, fuzzy rules and Directed Acyclic Graph (DAG) trees are described. One-class Support Vector Domain Description (SVDD) is described and contrasted to conventional two- or multi-class classifiers. The use of Support Vector Regression (SVR) is illustrated including its application to multivariate calibration, and why it is useful when there are outliers and non-linearities.

1,899 citations

Journal ArticleDOI
01 Jan 1972-Analyst
TL;DR: A method involving the use of 4-aminophenazone as a colour coupler with sulphonated 2,4-dichlorophenol is described for determining the hydrogen peroxide produced from glucose with glucose oxidase.
Abstract: A method involving the use of 4-aminophenazone as a colour coupler with sulphonated 2,4-dichlorophenol is described for determining the hydrogen peroxide produced from glucose with glucose oxidase.The sensitivity of the method is such that 20 µg of glucose in a final volume of 4 ml give an optical density of 0·61 at 515 nm with 10-mm cells, corresponding to a molecular absorption of 22 000.

1,357 citations

Journal ArticleDOI
01 Jan 1983-Analyst
TL;DR: In this paper, the relative fluorescence quantum yields were determined using a computer-controlled luminescence spectrometer and the relative absorbances of the standards and unknowns were measured using the same instrument as for the fluorescence measurements.
Abstract: Relative fluorescence quantum yields are determined using a computer-controlled luminescence spectrometer. The relative absorbances of the standards and unknowns are measured using the same instrument as for the fluorescence measurements. Relative quantum yields are presented for a wide range of compounds at room temperature.

1,307 citations

Performance
Metrics
No. of papers from the Journal in previous years
YearPapers
2023289
2022452
2021783
2020852
2019799
2018657