5.1 Cyanide is highly toxic. Regulations have been established to require the monitoring of cyanide in industrial and domestic wastes and in surface waters (Appendix X1).
5.2 Test Method D is applicable for natural water and clean metal finishing or heat treatment effluents. It may be used for process control in wastewater treatment facilities providing its applicability has been validated by Test Method B or C.
5.3 The spot test outlined in Annex A1 can be used to detect cyanide and thiocyanate in water or wastewater, and to approximate its concentration.
1.1 These test methods cover the determination of cyanides in water. The following test methods are included:
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| Sections |
| Test Method A | 12 – 18 |
| Test Method B | 19 – 25 |
| Test Method C | 26 – 32 |
| Test Method D | 33 – 39 |