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Formaldehyde is a highly reactive impurity that can be found in many pharmaceutical excipients. Trace levels of this impurity may affect drug product stability, safety, efficacy, and performance. A static headspace gas chromatographic method was developed and validated to determine formaldehyde in pharmaceutical excipients after an effective derivatization procedure using acidified ethanol
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Mar 21, 2021 · The gas phase (G in Figure 5.1. 10) is commonly referred to as the headspace and lies above the condensed sample phase. The sample phase (S in Figure 5.1. 10 contains the compound (s) of interest and is usually in the form of a liquid or solid in combination with a dilution solvent or a matrix modifier.
3.6.1 Properties of Open-Tubular Columns for Gas Samples 89. 3.6.2 Headspace Sampling with Split or Splitless Introduction 90. 3.6.3 Comparison of Split and Splitless Headspace Sampling 93. 3.6.4 Band Broadening During Sample Introduction 96. 3.6.5 Influence of Temperature on Band Broadening 99. 3.6.5.1 Conclusions 101
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Jan 01, 2021 · Headspace extraction is one of the most straightforward and common sample preparation techniques for gas chromatography. In general, volatile analytes are extracted from liquid or solid samples by placing them in a sealed vial, bringing the system to equilibrium, and collecting a sample of the vapor.
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