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Handbook of Solvents - George Wypych - ChemTech - Ventech!

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14.21.1 Use <strong>of</strong> solvents in manufacture <strong>of</strong> drugs 993<br />

Table 14.21.1.10. Specification for acetone<br />

A common problem which can be met regularly in chemistry is the identification <strong>of</strong><br />

signals from common contaminants in solvents <strong>of</strong> medium quality (see paragraph<br />

14.21.1.2.1.6.1). Gottlieb and Col 35 have published data on NMR chemical shifts <strong>of</strong> trace<br />

impurities contained in common laboratory solvents, making NMR spectroscopy the instrument<br />

<strong>of</strong> choice as a tool for routine quality control.<br />

14.21.1.5.2 Quality <strong>of</strong> solvents used in chromatography<br />

The aim <strong>of</strong> this paragraph is not to focus on strategies for solvent selection in order to<br />

achieve extraction or liquid chromatography. A detailed literature review has been published<br />

by Barwick 36 on this matter allowing the user to design relevant methodology in any

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