Quím. Nova vol.36 número6

HPLC-PDA monitoring of alkaloid isomerization after heating under reflux of pentacyclic oxindole alkaloid (POA) (a) and tetracyclic oxindole alka- loids (TOA) (b) in dynamic

Using the same magnetic parameters set optimized for a simulation model with one or two components, we analyzed the influence of the addition of 40 mol % cholesterol to the

Based on the considerations outlined above, the aim of this paper was to investigate EC, together with several other contaminants (me- thanol, copper, and lead) and

After determining the accuracy of the proposed SPE method, the method was applied to the determination of environmental trace Cu(II) ions in rice, tea, and tobacco as solid

The results of this study clearly demonstrate that polyamide column chromatography combined with HSCCC is an efficient method for the separation and purification of polyphenols

The results obtained by ICP-SFMS for the U concentration were reasonably in accordance with the target values of U provided by the PROCORAD 2010 urine samples, although the

If the t -test 3 was used, which is incorrect, the comparison of the methods would not be considered equivalent, because, to the 95% confidence level, the value of t

Using the Rich and Suter diagram for the second transition period (Figure 1b), it is also easy to explain why Pd has a 5s 0 4d 10 electron configuration. Because the two levels