As seen from Table 5, the residue content of styrene monomers analyzed from polystyrene latex samples was 0.217 for analysis with UV/visible spectrophotometry
. This small amount was compared with the results of the GC method because of the possibility of the impurity which absence in GC gas or the presence of dimers and trimers that were difficult to avoid disturbing the absorption.
The development of the analytical methods by spectrophotometry
in the mid-infrared region has been successfully used in the quantification of other drugs [18, 21-36].
to measure cffDNA is a cheap method, but it may not be intensive enough or we need larger patient groups for searching.
Second Derivative Spectrophotometry
. Figures 8 and 9 show the second derivative absorption spectra of DA and [DELTA][lambda] at pH 9.2 after 5 min with a range of concentrations 2-50 [micro]M and 2-2.4 [micro]M, respectively.
Calculated F values were 0.77 and 2.14 for CZE and UV spectrophotometry
In this present work, selective, sensitive, simple, and low-cost procedures were developed for the simultaneous determination of Carmoisine (C) and Ponceau 4R (P) in synthetic mixture and drink samples by using derivative spectrophotometry
(DSM), ratio derivative spectrophotometry
(RDM), derivative differential spectrophotometry
(DDM), and compensation method (CM).
This paper describes the development and subsequent validation of a novel, simple, and rapid spectrophotometric method "Sequential Spectrophotometry
" for simultaneous quantitation of ternary mixtures.
A later paper described using methylene blue as the working chemical for clay detection, but proposed a new method based on spectrophotometry
instead of the standard drop test.
Concentration of 3-hydroxybutyrate is usually determined through methods such as chromatography, isotopic measurements, and spectrophotometry
. These methods, however, are usually time-consuming and require a number of processing stages.
Five of these 6 neonates had TSB levels more than 20 mg/dl by direct spectrophotometry
(capillary sample) and diazo method (clot sample), and one of them had a TSB level of 18.9 mg/dl.
The most commonly used methods to monitor dyes during the dyeing process are spectrophotometry
and voltammetry (BERGAMINI et al., 2005; CARBO et al., 2010; CATANHO et al., 2006; THOMAS; AURORA, 2006; ZANONI et al., 2006).