Hanna Instruments HI 83214 Instruction Manual

36BlankD.I. WaterSampleSampleBlankSampleMEASUREMENT PROCEDUREBefore using the reagent kit carefully read all the instructions and the Material Safety DataSheet (MSDS). Pay particular attention to all warnings, cautions and notes. Failure to do somay result in serious injury to the operator.Reagent Blank Correction: This method requires a reagent blank correction. A single blank vial may be usedmore than once; the blank vial is stable up to one week if stored in a dark place at room temperature. Alwaysuse the same lot of reagents for blank and samples. For most accurate measurement, run a blank for each setof measurements.• Preheat the Hanna Reactor HI 839800 to 105 °C (221°F). For correct use of the reactor follow ReactorInstruction Manual.Use of the optional HI 740217 safety shield is strongly recommended.DO NOT USE AN OVEN OR MICROWAVE samples may leak and generate a corrosive and possiblyexplosive atmosphere.• Remove the caps from two Digestion Vials ( red label).• Add the content of one packet of Potassium Persulfate for Total Nitrogen analysis to each vial.• Add exactly 0.5 mL of sample to one vial (sample vial), and 0.5 mL of deionized water to the othervial (blank vial), while keeping the vials at a 45-degree angle.← red label →Nitrogen, Total HR