CQUniversity Australia - Bob Patterson's Abstract

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Bob Patterson's Abstract

Dr Bob Patterson

Topic: Soil and water quality - Guess what the numbers mean?

Abstract: Our understanding of water quality is based upon a laboratory analysis of the constituents and their proportions in water. Obviously clean water has less contaminants than wastewater but how good is our ability to quantify the concentrations and when is the answer 'right'. The same questions apply equally to soil. Interlaboratory performance programs shows a significant variability between sample types and between laboratories as well as well as within sample variability. How we evaluate laboratory results depends upon our understanding of sample variability and the other influences that can affect the interpretation. This presentation will examine a range of proficiency testing program results from laboratory certifying organisations to clarify our understanding of what the numbers may mean.