Read e-book online Analytical chemistry : methods and applications PDF

By Harold H Trimm

ISBN-10: 1926692586

ISBN-13: 9781926692586

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In these experiments, one parameter was changed whereas the others were kept unchanged, and the recovery percentage was calculated each time. It was found that small variation of method variables did not significantly affect the procedures. This provided an indication for the reliability of the proposed method during its routine appli cation for the analysis of AMD. Ruggedness was also tested by applying the proposed methods to the assay of AMD using the same operational conditions but using two different instruments at two different laboratories and different elapsed time.

1 mg/mL in 10% ACN, 3 µg injected on column). 42 Analytical Chemistry: Methods and Applications Figure 8. (a) MS/MS analysis (with accurate mass determination) of the protonated ion of MS447. (b) Schematic of the MS/MS fragmentation interpretation of MS447. Figure 9. Proposed structures and formation pathway for the two unknown impurities in AMG 517. 0144 Da was determined for the protonated ion of impurity MS405. Elemental composition analysis using the observed mass determined that the elemental formula C16H12N4O3S3 was the best fit for the impurity.

Potential fragments produced by acid hydrolysis of Unknown 2. Structures on the left represent fragments expected to be generated from the thioether, those on the right from the bis-sulfoxide. Fragment 241 would be common to both structures. Table 5 shows the accurate mass assignments for the acid hydrolysis products of Unknown 2 as well as the calculated exact mass for each product that was expected to arise from both the proposed thioether and bis-sulfoxide structures. The mass error (observed mass versus calculated mass of the hydrolysis fragments) is shown for each proposed structure for Unknown 2.

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Analytical chemistry : methods and applications by Harold H Trimm


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