BS EN ISO 23161 pdf download

BS EN ISO 23161 pdf download Soil quality — Determination of selected organotin compounds — Gas- chromatographic method 5.5 Clean-up 5.5.1 General requirements A silica or aluminium oxide clean-up is the minimum requirement. Further clean-up steps (aluminium oxide/silver nitrate, silica/silver nitrate, pyrogenic copper) may be applied if necessary (see Annex B). A recovery of > 80 % of the internal...