Chemical analysis for synthetic organic compounds should NOT be collected in containers made of which material?

Chemical analysis for synthetic organic compounds should not be collected in containers made of polypropylene because this material can potentially interact with certain organic chemicals. Polypropylene may leach substances into the sample or absorb the analyte, leading to inaccurate results in chemical analysis. This is particularly important for synthetic organic compounds, which can be sensitive to contamination or alteration of their properties during storage and transport.

On the other hand, glass, polyvinyl chloride, and polyethylene are generally more inert and less likely to react with or absorb the compounds being studied. Glass is often used for its non-reactive properties, while polyethylene and polyvinyl chloride containers have been found to be suitable for many types of chemical analyses, provided that the specific compatibility of the container with the specific chemicals is verified.