## Determination of sediment metal background concentrations and enrichment in marine environments - A critical review.

- Gavin F. Birch
- The Science of the total environment
- 2017

Highly Influenced

@article{Reimann2005BackgroundAT, title={Background and threshold: critical comparison of methods of determination.}, author={Clemens Reimann and Peter Filzmoser and Robert G. Garrett}, journal={The Science of the total environment}, year={2005}, volume={346 1-3}, pages={1-16} }

- Published 2005 in The Science of the total environment

Different procedures to identify data outliers in geochemical data are reviewed and tested. The calculation of [mean+/-2 standard deviation (sdev)] to estimate threshold values dividing background data from anomalies, still used almost 50 years after its introduction, delivers arbitrary estimates. The boxplot, [median+/-2 median absolute deviation (MAD)] and empirical cumulative distribution functions are better suited for assisting in the estimation of threshold values and the range of… CONTINUE READING