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Details

PB2001108275

Publication Date	2001
Page Count	44
Abstract	Kelada-01 provides for rapid determination of total cyanide, acid dissociable cyanide, and thiocyanate in drinking water, wastewater, ambient water, and sludge, with minimal effects from interferences. Kelada-01 was developed by Dr. Nabih Kelada, and represents the culmination of years of cyanide chemistry research. The method uses a combined on-line ultraviolet (UV) irradiation and flash distillation system in place of classical manual cyanide distillation procedures to determine total cyanide. Under irradiation in a glass coil, strongly-bound complex cyanides (excluding thiocyanate) break down into free cyanide, which is separated from the sample matrix by distillation and is detected using an on-line colorimeter. By omitting UV-irradiation, acid dissociable cyanide complexes are broken down and determined. By replacing the glass irradiation coil with a quartz coil, thiocyanate can be determined.
Keywords	Cyanides Water pollution sampling Thiocyanate content Test methods Quartz coils Foreign technology Kelada-01 On-line ultraviolet radiation Flash distillation On-line colorimeter
Source Agency	Environmental Protection Agency Office of Water Programs
Corporate Authors	Environmental Protection Agency, Washington, DC. Office of Water.
Document Type	Technical Report
NTIS Issue Number	200125

Method Kelada-01: Kelada Automated Test Methods for Total Cyanide, Acid Dissociable Cyanide, and Thiocyanate. Revision 1.2.

Method Kelada-01: Kelada Automated Test Methods for Total Cyanide, Acid Dissociable Cyanide, and Thiocyanate. Revision 1.2.
PB2001108275

Publication Date	2001
Page Count	44
Abstract	Kelada-01 provides for rapid determination of total cyanide, acid dissociable cyanide, and thiocyanate in drinking water, wastewater, ambient water, and sludge, with minimal effects from interferences. Kelada-01 was developed by Dr. Nabih Kelada, and represents the culmination of years of cyanide chemistry research. The method uses a combined on-line ultraviolet (UV) irradiation and flash distillation system in place of classical manual cyanide distillation procedures to determine total cyanide. Under irradiation in a glass coil, strongly-bound complex cyanides (excluding thiocyanate) break down into free cyanide, which is separated from the sample matrix by distillation and is detected using an on-line colorimeter. By omitting UV-irradiation, acid dissociable cyanide complexes are broken down and determined. By replacing the glass irradiation coil with a quartz coil, thiocyanate can be determined.
Keywords	Cyanides Water pollution sampling Thiocyanate content Test methods Quartz coils Foreign technology Kelada-01 On-line ultraviolet radiation Flash distillation On-line colorimeter
Source Agency	Environmental Protection Agency Office of Water Programs
Corporate Authors	Environmental Protection Agency, Washington, DC. Office of Water.
Document Type	Technical Report
NTIS Issue Number	200125