Hanna Instruments HI 83214 Instruction Manual

28SPECIFICATIONSRange 0.0 to 30.0 mg/L NO3--NResolution 0.1 mg/LAccuracy ±1.0 mg/L or ±5 % of reading @ 25 °C, whichever is greaterLight Source Tungsten lamp with narrow band interference filter @ 420 nmMethod Chromotropic acid method. The reaction between nitrate and the reagents causes ayellow tint in the sample.REQUIRED REAGENTSCode Description Q.ty/test Q.ty/setHI 93766V-0* Reagent Vial 1 vial 50 vialsHI 93766-0 Nitrate Reagent 1 packet 50 packets*Reagent Vial identification: N, white label.Note: Store the unused vials in a cool and dark place.REAGENT SETHI 93766-50 Reagents for 50 testsFor other accessories see page 68.MEASUREMENT PROCEDUREBefore using the reagent kit carefully read all the instructions and the Material Safety Data Sheet(MSDS). Pay particular attention to all warnings, cautions and notes. Failure to do so may resultin serious injury to the operator.• Select theNitrate method following one of the procedures described in the “Method Selection” section(see page 15).• Remove the cap from a Reagent Vial.• Add exactly 1.0 mL of sample to the vial, while keeping thevial at a 45-degree angle.• Replace the cap tightly and invert the vial 10 times. This is the blank.Warning: The vial will become hot during mixing, be careful when handling it.Note: The method is technique sensitive: to obtain reproducible results it isstrongly recommended to follow carefully the “invert” proceduredescribed on page 10.• Place the vial into the holder and push it completely down.NITRATENitrate