How many samples are needed to prove the absence of contamination - an example using arsenic? John A. Heathcote 10.6084/m9.figshare.7770920.v1 https://geolsoc.figshare.com/articles/dataset/How_many_samples_are_needed_to_prove_the_absence_of_contamination_-_an_example_using_arsenic_/7770920 An Excel spreadsheet containing the full dataset, showing its sub-sampling 2019-02-26 14:28:37 sub-sampling dataset sample absence Excel spreadsheet contamination arsenic Geology