By Harold H Trimm
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Extra info for Analytical chemistry : methods and applications
2% area. LC-MS analysis was performed on lot A, the starting material used in the production of the six kilogram-scale AMG 517 batches. Analysis of this lot indicated that there were multiple impurities, some of which had the potential to generate Unknowns 1 and 2 (see Figure 7). , MS447 corresponds to a compound with an observed mass of 447 Da). Table 6 provides a summary of the proposed structures for the observed impurities of Nacetyl benzothiazole. 0247 Da was determined for the protonated ion of impurity MS447 in N-acetyl benzothiazole.
03%, w/v in methanol) was added and the reaction was allowed to proceed for 5 minutes at room temperature (25 ± 5°C). 025 M ethanolic HCl and the fluorescence intensity of the resulting solution was measured at 382 nm after excitation at 293 nm against reagent blanks treated similarly. Determination of the Molar Ratio of the Reaction The Job’s method of continuous variation  was employed. 5×10−2 M) aqueous solutions of AMD and NQS were prepared. , 9:1, 10:0, inclusive) in test tubes. 01 M NaOH was added to each tube, and the tubes were further manipulated as described under the general recommended procedure for the spectrophotometric method.
Chem. 16 (1936), p. 54, Oliner and Boyd, Edinburgh, UK, 2nd edition, 1964. M. Pesez and J. Bartos, Colorimetric and Fluorimetric Analysis of Organic Compounds and Drugs, Marcel Dekker, New York, NY, USA, 1974. ICH guideline and Q2(R1), “Validation of Analytical Procedures: Text and Methodology,” London, 2005. 32. The United States Pharmacopeia 25, The National Formulary 20, US Pharmacopeial Convention Inc, Rockville MD, 101–103, 2256–2259, 2002. Analytical Applications of Reactions of Iron(III) and Hexacyanoferrate(III) with 2,10-Disubstituted Phenothiazines Helena Puzanowska-Tarasiewicz, Joanna Karpińska and Ludmiła Kuźmicka Abstract The presented review is devoted to analytical applications of reactions of Fe(III) and K3[Fe(N)6] with 2,10-disubstituted phenothiazines (PT).
Analytical chemistry : methods and applications by Harold H Trimm