Discussion
Why is glassware sometimes avoided for trace metal work?
Answer: B
Ions adsorb onto glass at low concentration and leach from it at low pH, so both losses and contamination occur. Glass is not in the light path, resists most acids apart from hydrofluoric, and silicon is not usually the analyte. Plastic vessels, acid-washed and dedicated to the work, are the standard remedy, and the choice of container becomes a real part of the method at these levels.
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