Azulay, Determination of sun protection factor by Spectrophotometry
When compared to the GC method, the % retrieval obtained on the UV/visible spectrophotometric analysis was smaller, this was probably due to the absence of splitting of the impurity elements by spectrophotometry
. Both packed GC and capillary GC show average recovery above 95%, so it could be said that both of these methods were quite reliable in styrene analysis in polystyrene latex.
It is in this context, the infrared spectrophotometry
stands out because it is a method that allows to quantify substances without organic solvents.
We tried to measure cffDNA from maternal blood using spectrophotometry
First Derivative Spectrophotometry
. From Figure 5, the obtained data show the first derivative absorption spectra of 1 x [10.sup.-5] mol [L.sup.-1] of DA and AA at pH 9.2 after 5 min.
and CZE, used for the determination of PIR in tablets, were statistically compared with t- and F tests.
These include capillary electrophoresis , differential pulse polarography , high performance liquid chromatography [6-9], electrospray mass spectrometry , spectrophotometry
[11-13], partial least squares , and spectrofluorimetry .
cannot resolve the drugs in their mixtures with impurities or other drugs, so several manipulations were performed to enable resolution of binary and ternary mixtures.
The new facility also holds special laboratories for the SRA, particularly spectrophotometry
and microscopy laboratories, an environmental research (water, air, soil) laboratory, and an analytical research laboratory.
Based on spectrophotometry
and densitometry data, a printer's specification was generated.
The topics include data analysis, acid-based titration, complexation reactions and complexometric titration, spectrophotometry
, and solving a read analytical problem.