The answer to the commonly asked question of how one type of oil in water measurement compares with different regulatory methods is not always simple and straightforward. Four factors need to be considered:
- Precision and bias for each method
- Operator errors
- Sample disparities
So, the answer to the initial question as to whether one analysis method will match another is that most methods will typically correlate closely enough to provide operators with the information necessary to make sure their effluent does not exceed the regulatory limit. Will the numbers match exactly?
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