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10:8 Contamina(on from the Analyst and Apparatus

Contamina(on from the apparatus: A Closer Look at Quartz

Table 10.2 MAXIMUMRECORDED IMPURITY LEVELS IN VARIOUS TYPES T. Murphy, Na(onal Bureau of Standards Special Publica(on 422, "Accuracy in Trace Analysis: Sampling, Sample Handling, and Analysis", Proceedings of the 7th IMR Symposium.

Note: ND = Not Detected

10:9 Contamina:on from the Analyst and Apparatus

Contamination from the apparatus: A Closer Look at Quartz

Table 10.3 shows a comparison of impurities in natural quartz to other common laboratory apparatus. Table 10.3: Trace Element Concentration of Container Materials