Standard

BS EN ISO 10304-3:1997

Water quality. Determination of dissolved anions by liquid chromatography of ions - Determination of chromate, iodide, sulfite, thiocyanate and thiosulfate

Current, Under Review

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Published:

15 Oct 1997

1 Scope

This part of ISO 10304 specifies methods for the determination in aqueous solution of the dissolved anions

— iodide, thiocyanate and thiosulfate (clause 4);
— sulfite (clause 5);
— chromate (clause 6).

An appropriate pretreatment of the sample (e.g. dilution) and the application of a conductivity detector (CD), UV detector (UV) or amperometric detector (AD) make the working ranges given in table 1 feasible.

Table 1 — Applicable working ranges

Anion	Working range 1)	Detector
1) The working range is restricted by the exchange capacity of the columns. Dilute the sample into the working range if necessary.
Chromate (CrO₄), clause 6	0,05 mg/l to 50 mg/l	UV (λ = 365 nm)
Iodide (I), clause 4	0,1 mg/l to 50 mg/l	CD or UV (λ = 205 nm to 236 nm) AD (approximately 0,7 V to 1,1 V)
Sulfite (SO₃), clause 5	0,1 mg/l to 50 mg/l 0,5 mg/l to 50 mg/l	CD UV (λ = 205 nm to 220 nm)
Thiocyanate (SCN), clause 4	0,1 mg/l to 50 mg/l	CD or UV (λ = 205 nm to 220 nm) AD (approximately 0,7 V to 1,1 V)
Thiosuifate (S₂O₃), clause 4	0,1 mg/l to 50 mg/l	CD or UV (λ = 205 nm to 220 nm) AD (approximately 0,7 V to 1,1 V)

Product Details

Descriptors

Sampling methods

Water pollution

Working range

Chromatography

Sulfites

Interferences (chemical)

Ions

Reproducibility

Biochemical methods of analysis

Control samples

Thiocyanates

Liquid chromatography

Chemical analysis and testing

Determination of content

Water

Quality

Statistical data

Iodides

Anions

Calibration

Chromates

Thiosulfates

ICS Codes

13.060.50 Examination of water for chemical substances

Committee

EH/3/2

International relationships

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ISBN

0 580 28485 9

Publisher

BSI