Hanna Instruments HI 83214 - Manual (Page 31)

31
Blank
D.I. Water
Sample
Sample
Blank Sample
←
green label
→
Nitrogen, Total LR
MEASUREMENT PROCEDURE
Before 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 result in serious injury to the operator.
Reagent Blank Correction: This method requires a reagent blank correction. A single blank vial may be used
more than once; the blank vial is stable up to one week if stored in a dark place at room temperature. Always
use the same lot of reagents for blank and samples. For most accurate measurement run a blank for each set
of measurements.
• Preheat the Hanna Reactor HI 839800 to 105 °C (221°F). For correct use of the reactor follow Reactor
Instruction Manual.
The optional HI 740217 safety shield is strongly recommended.
DO NOT USE AN OVEN OR MICROWAVE samples may leak and generate a corrosive and possibly
explosive atmosphere.
• Remove the caps from two Digestion Vials ( green label).
• Add the content of one packet of Potassium Persulfate for Total Nitrogen analysis to each vial.
• Add exactly 2.0 mL of sample to one vial (sample vial), and 2.0 mL of deionized water to the other
vial (blank vial), while keeping the vials at a 45-degree angle.