Hach DR2400 - Page 276

Cyanide
© Hach Company, 2003. All rights reserved. Printed in the U.S.A. 3/04 1ed
Page 4 of 4 Cyanide_UniCell_Other_PPZ_Eng_Ody.fm
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Method Performance
Precision
Standard: 0.30 mg/L Free CN
–
See Section 3.4.3 Precision on page 44 for more information, or if the standard
concentration did not fall within the specified range.
Sensitivity
See Section 3.4.5 Sensitivity on page 44 for more information.
Summary of Method
Cyanides react with chlorine to form cyanogen chloride, which in turn reacts
with pyridine in the presence of barbituric acid, condensing to form a violet-
colored compound. Measurements are taken at 588 nm.
Required Reagents
Description Unit Cat. No.
Cyanide - CN, UniCell™ HCT 129
*
................................................................................. 23/pkg.............. HCT 129
Required Apparatus
Adapter, 16-mm Cell .......................................................................................................... each....................59457-00
Optional Apparatus
Flask, volumetric, 100-mL ................................................................................................. each....................14574-42
Graduated cylinder, mixing, 100-mL............................................................................... each....................20886-42
Pipettor, (Jencons) 1–5 mL................................................................................................. each....................27951-00
Replacement tips for 27951-00 .......................................................................................... pk/100...............27952-00
Pipettor, (Jencons) 100–1000 µL........................................................................................ each....................27949-00
Replacement tips for 27949-00 .......................................................................................... pk/400...............27950-00
pH Paper.............................................................................................................................. pk/100...............26013-00
Optional Reagents
Potassium Cyanide............................................................................................................. 125 g.......................767-14
Sulfuric Acid Standard Solution, 1.00 N ......................................................................... 1 L ........................1270-53
Program 95% Confidence Limits of Distribution
813 0.23–0.37 mg/L CN
–
Program Portion of Curve ∆Abs ∆Concentration
813 Entire range 0.010 0.01 mg/L CN
–
* Available in Europe only