Cyanide (total) – Drinking Water

Laboratory Fee Schedule
Group: Inorganic
Procedure #: EZZ0031A

Synonym(s):	Cyanide in potable Water
Requisition Form	G-22
Test Description	The determination of total available cyanide, which is the sum of the strong acid dissociable, weak acid dissociable, and free cyanide, in samples of drinking water.
Pre-Approval Needed	No
Supplemental Information Required	N/A
Supplemental Form(s)	N/A
Performed on Specimens from (sources)	Environmental
Sample/Specimen Type for Testing	Drinking water
Minimum Volume/Size Required	1 L
Storage/Preservation Prior to Shipping	Store in hard or soft plastic or glass container. Measure and record the chlorine residual. Add 100 mg of ascorbic acid to dechlorinate sample and as much sodium hydroxide necessary to achieve pH between 12.0-12.5. Maintain sample at 4.0°C. Some headspace is allowed.
Transport Medium	Ascorbic acid Sodium hydroxide
Specimen Labeling	Sample identification must match submission form.
Shipping and Specimen Handling Requirements	Must be tested by laboratory within 14 days of collection. Ship according to Dangerous Goods Regulations, IATA, and/or CFR 49.
Method	QuikChem 10-204-00-1-X
Turn-around Time	N/A
Interferences/Limitations	Some known interferences are as follows: Aldehydes, nitrate-nitrite, and oxidizing agents, which can decompose most cyanides; and Substances that might contribute color or turbidity.
Common Causes for Rejection	Insufficient quantity Unacceptable specimen type or source Improper shipping conditions Expired media or collection container Discrepancies between specimen label and submission form Incomplete or missing submission form
Additional Information	N/A