Lachat Method: Chloride 10-117-07-1-A

Document ID

Document ID ME180

Published Date

Published Date 05/11/2020
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Method Number
Lachat Method: Chloride 10-117-07-1-A
Summary
Method # Range MDL Units Matrix Rev. Date
10-117-07-1-A 6-300 0.15 mg/L Cl- Waters 29-Nov-07
Principle
Thiocyanate ion is liberated from mercuric thiocyanate by the formation of soluble mercuric chloride. In the presence of ferric ion, free thiocyanate ion forms the highly colored ferric thiocyanate, of which the absorbance is proportional to the chloride concentration. Ferric thiocyanate absorbs strongly at 480 nm. The calibration curve fits a second order polynomial.

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