DIN Standards Committee Food and Agricultural Products
Soil improvers and growing media - Digestion by aqua regia for subsequent determination of elements; German and English version prEN 13650:2025
Abstract
This document specifies a method for the digestion of soil improvers and growing media using an aqua regia digestion. Materials containing more than about 28 % (m/m) organic matter will require treatment with additional nitric acid. With high solute concentrations in extract solutions, spectral interferences and background enhancement can be expected. NOTE This method has been validated in an interlaboratory study with specific products that were present on the market during the study (as included in Annex B, being biowaste compost (dry heavy metals (HM) spiked, Rottegrad 3, milled, sieved at 0,5 mm, dried and spiked), green compost (dry HM spiked, Rottegrad 5, milled, sieved at 0,5 mm, dried and spiked), liquid digestate (HM spiked, sieved 0 mm to12 mm, spiked), expanded clay (dry HM spiked, milled, sieved at 0,5 mm, dried and spiked), mineral wool (fresh), soil improver (dry HM spiked, milled, sieved at 0,5 mm, dried and spiked) and growing media blend 1 (dry HM spiked, white peat, green compost, wood fibre, lime, inorganic fertilizer (NPK + micro elements), milled, sieved at 0,5 mm, dried and spiked)).
Begin
2023-04-23
WI
00223101
Planned document number
DIN EN 13650
Project number
05702203
Responsible national committee
NA 057-03-01 AA - Soil improvers and growing media
Responsible european committee
CEN/TC 223/WG 4 - Analytical methods
draft standard
Soil improvers and growing media - Digestion by aqua regia for subsequent determination of elements; German and English version prEN 13650:2025
2025-10
Order from DIN Media
