1. BS EN ISO 54321. Soil, treated biowaste, sludge and waste. Digestion of aqua regia soluble fractions of elements. (4th November 2019) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (46 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
2. Soil, treated biowaste, sludge and waste. Digestion with a hydrochloric (HCl), nitric (HNO3 ) and tetrafluoroboric (HBF4 ) or hydrofluoric (HF) acid mixture for subsequent determination of elements. (30th November 2020) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (40 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
3. BS EN 13656. Soil, treated biowaste, sludge and waste. Digestion with a hydrochloric (HCl), nitric (HNO3) and tetrafluoroboric (HBF4) or hydrofluoric (HF) acid mixture for subsequent determination of elements. (12th September 2019) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (37 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
4. Soil, treated biowaste, sludge and waste. Digestion of aqua regia soluble fractions of elements. (2nd February 2021) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (48 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗