NIES CRM 31: Lake Sediment

This environmental certified reference material (CRM) was developed and certified by the National Institute for Environmental Studies (NIES) for the determination of multi-elements in lake sediment and in materials of similar matrix. This CRM supersedes NIES CRM 2 Pond Sediment. Certified values and reference values are given for the whole material as supplied, and for the HCl/HNO3/HClO4 extract, determined according to "Methods for Sediment Surveillance" of the Ministry of the Environment, Japan.

The origin of this material is sediment collected at Lake Kasumigaura, Japan in February 1999. The raw sediment was dried in the sun and the clods that formed were crushed, sieved through a 2 mm sieve, and dried at 105°C overnight. This dry material was then ground in an alumina ball mill, and passed first through a 212 µm sieve and then through a 75 µm sieve. The sieved material was homogenized with a V-blender to yield 12.2 kg of powder suitable for use as the CRM. The final material was placed in amber glass bottles (20 g in each bottle, 560 bottles., and sterilized by 60Co irradiation (20 kGy).

keywords:  Environmental material, Particulate matter, Soil/Sediment, Trace elements,  Heavy metals, Fractionation analysis