ISO-10304-3 › Water quality - Determination of dissolved anions by liquid chromatography of ions - Part 3: Determination of chromate, iodide, sulfite, thiocyanate and thiosulfate
ISO-10304-3
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1ST EDITION
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CURRENT
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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 |
Chromate (CrO4), clause 6 | 0,05 mg/l to 50 mg/l | UV (λ = 365 nm) |
Iodide (1), 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 | CD |
0,5 mg/l to 50 mg/l | UV(λ = 205nmto220nm) | |
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) |
Thiosulfate (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) |
1) The working range is restricted by the exchange capacity of the columns. Dilute the sample into the working range if necessary. |
To find similar documents by classification:
13.060.50 (Examination of water for chemical substances)
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Document Number
ISO 10304-3:1997
Revision Level
1ST EDITION
Status
Current
Publication Date
Aug. 15, 1997
Committee Number
ISO TC 147/SC 2/WG 33