# ISO 10390:2005 — Withdrawn and superseded ISO standards For ISO 10390:2005, item title is Soil quality — Determination of pH; status code is 9599; successor is ISO 10390:2021; withdrawn / published date is 2005-02-21, recorded from its source on 2026-08-05. - **Identifier:** ISO 10390:2005 _(verified: appears in the quote below)_ - **Item title:** Soil quality — Determination of pH _(verified: appears in the quote below)_ - **Status code:** 9599 _(verified: appears in the quote below)_ - **Successor:** ISO 10390:2021 - **Withdrawn / published date:** 2005-02-21 _(verified: appears in the quote below)_ ## What the source says > 40879,IS,,ISO 10390:2005,Soil quality — Determination of pH,Qualité du sol — Détermination du pH,2005-02-21,2,['13.080.10'],ISO/TC 190/SC 3,9599,[18454],[75243],"['en','fr']",7,"
ISO 10390:2005 specifies an instrumental method for the routine determination of pH using a glass electrode in a 1:5 (volume fraction) suspension of soil in water (pH in H2O), in 1 mol/l potassium chloride solution (pH in KCl) or in 0,01 mol/l calcium chloride solution (pH in CaCl2).
ISO 10390:2005 is applicable to all types of air-dried soil samples, for example pretreated in accordance with ISO 11464.
" ## Source - https://isopublicstorageprod.blob.core.windows.net/opendata/_latest/iso_deliverables_metadata/csv/iso_deliverables_metadata.csv Last verified: 2026-08-05. Review by: 2027-02-01. Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).