ISO 21268-4:2019 土壌の質 — 土壌および土壌様物質のその後の化学的および生態毒性試験のための浸出手順 — Part 4: 最初の酸/塩基添加による浸出に対するpHの影響 | ページ 6

3.1

leaching test

test during which a material is put into contact with a leachant (3.2) under strictly defined conditions and some substances of the material are extracted

3.2

leachant

liquid used in a leaching test (3.1)

Note 1 to entry: For the purpose of this document, the leachant is specified in 6.1

3.3

eluate

solution recovered from a leaching test (3.1)

Note 1 to entry: Eluate is also referred to as leachate.

3.4

liquid to solid ratio

L/S

ratio between the total volume of liquid (L in litres), which in this extraction is in contact with the soil sample, and the dry mass of the sample (S in kg of dry matter)

Note 1 to entry: L/S is expressed in litres per kilogram (l/kg).

3.5

dry matter content

w_dm

ratio, expressed in percent, between the mass of the dry residue, determined in accordance with ISO 11465, and the corresponding raw mass

3.6

water content

ratio, expressed in percent, between the mass of water contained in the material as received and the corresponding dry residue of the material

Note 1 to entry: The basis for the calculation of the water content is the mass of the dry residue in this document, as specified in ISO 11465 (for the determination of the water content of soil).

3.7

laboratory sample

sample or subsample(s) sent to or received by the laboratory

3.8

test sample

sample, prepared from the laboratory sample (3.7) , from which test portions (3.9) are removed for testing or analysis

3.9

test portion

quantity of material of appropriate size for measurement of the concentration or other properties of interest taken from the test sample (3.8)

Note 1 to entry: The test portion can be taken from the laboratory sample (3.7) directly if no pre-treatment of the sample is required, but usually it is taken from the test sample.

Note 2 to entry: A unit or increment of proper homogeneity, size and fineness, needing no further preparation, can be a test portion.

3.10

soil-like material

excavated soil, dredged materials, manufactured soils, treated soils and fill materials