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BS ISO 14388-2:2014

Current
Current

The latest, up-to-date edition.

Soil quality. Acid-base accounting procedure for acid sulfate soils Chromium reducible sulfur (CRS) methodology
Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

09-30-2014

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents for analysis of chromium reducible sulfur
6 Apparatus
7 Procedure for determining chromium reducible sulfur
8 Calculation of S[CR]
9 Reagents for determination of pH[KCl] and TAA
10 Procedure for determination of pH[KCl] and TAA
11 Calculation of TAA
12 Procedure for determination of sulfur (S[KCl]), calcium
   (Ca[KCl]), and magnesium (Mg[KCl]) extractable
   with 1 mol/l potassium chloride
13 Calculation of S[KCl], Ca[KCl], and Mg[KCl]
14 Reagents for determination of sulfur (S[HCl]), calcium
   (Ca[HCl]), and magnesium (Mg[HCl]) extractable
   with hydrochloric acid
15 Procedure for determination of sulfur (S[HCl]), calcium
   (Ca[HCl]), and magnesium (Mg[HCl]) extractable
   with hydrochloric acid
16 Calculation of net acid-soluble sulfur (S[NAS]), calcium
   (Ca[NAS]), and magnesium (Mg[NAS])
17 Reagents for determining acid neutralizing capacity by
   back-titration (ANC[BT])
18 Procedure for determining acid neutralizing capacity by
   back-titration (ANC[BT])
19 Alternatives for determination of acid neutralizing
   capacity
20 Precision
21 Test report
Bibliography

Describes a suite of methods used to determine the net acidity in acid sulfate soils.

This part of ISO14388 specifies a suite of methods used to determine the net acidity in acid sulfate soils. This part of ISO14388 specifies a method for measuring chromium reducible sulfur (SCR) by iodimetric titration of distilled hydrogen sulfide trapped as zinc sulfide, following acidic chromous chloride digestion. This method determines inorganic sulfides (e.g. pyrite, marcasite, greigite, mackinawite) and elemental sulfur in acid sulfate soil without interferences from organic sulfur and oxidized forms of sulfur such as sulfate. On a separate test portion of soil, the pH in a 1mol/l KCl soil suspension (pHKCl) is determined. When pHKCl is

Committee
EH/4
DevelopmentNote
Supersedes 13/30259625 DC. (09/2014)
DocumentType
Standard
Pages
30
PublisherName
British Standards Institution
Status
Current
Supersedes

Standards Relationship
ISO 14388-2:2014 Identical

ISO 385-2:1984 Laboratory glassware Burettes Part 2: Burettes for which no waiting time is specified
ISO 14254:2001 Soil quality Determination of exchangeable acidity in barium chloride extracts
ISO 8655-1:2002 Piston-operated volumetric apparatus Part 1: Terminology, general requirements and user recommendations
ISO 1042:1998 Laboratory glassware One-mark volumetric flasks
ISO 648:2008 Laboratory glassware — Single-volume pipettes
ISO 835-2:1981 Laboratory glassware Graduated pipettes Part 2: Pipettes for which no waiting time is specified
ISO 385-1:1984 Laboratory glassware — Burettes — Part 1: General requirements
ISO 835-3:1981 Laboratory glassware Graduated pipettes Part 3: Pipettes for which a waiting time of 15 s is specified
ISO 8655-2:2002 Piston-operated volumetric apparatus Part 2: Piston pipettes
ISO 835-1:1981 Laboratory glassware Graduated pipettes Part 1: General requirements
ISO 3696:1987 Water for analytical laboratory use — Specification and test methods
ISO 10694:1995 Soil quality Determination of organic and total carbon after dry combustion (elementary analysis)
ISO 8655-3:2002 Piston-operated volumetric apparatus Part 3: Piston burettes

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