User manual HANNA INSTRUMENTS HI 93754C-25 HR

[. . . ] Instruction Manual METHOD Adaptation of the EPA 410. 4 approved method. This method covers the determination of COD in surface water, domestic and industrial wastes. The sample is digested in the presence of dichromate at 150°C for 2 hours. [. . . ] 4 - Use the supplied syringe and add 2 ml (for LR and MR test) or 0. 2 ml (for HR test) of sample to the vial, while keeping the vial at a 45-degree angle. Range 0-150 mg/L 0-1500 mg/L 0-15000 mg/L Reagent Vial cap code color HI 93754A-25 red HI 93754B-25 white HI 93754C-25 green Sample q. ty 2. 0 mL 2. 0 mL 0. 2 mL www. hannainst. com Dear Customer, Thank you for choosing a Hanna product. Please read this instruction manual carefully before using the reagent. This manual will provide you with the necessary information for the correct use of the reagents. If you need additional information, do not hesitate to mail us at tech@hannainst. com. Note: to measure exactly 0. 2 mL of sample with the syringe, push the plunger completely into the syringe and insert the tip into sample. Pull the plunger out until the lower edge of the seal is on the 0. 0 mL mark of the syringe. Insert the syringe into the vial and push the sample out until the lower edge of the seal is on the 0. 2 mL mark. 5 - Replace the cap tightly and mix by inverting the vial a couple of times. Warning: as the vial becomes very hot during mixing, be careful in handling it. 6 - Using the other clean syringe, add to another reagent vial deionized water repeating steps 4 and 5 (2 ml for LR and MR, and 0. 2 ml for HR). Note: for an accurate measurement, run a blank with each set of samples and use the same box of reagents for blank and samples. 7 - Insert the vials into the reactor* and heat them for 2 hours at 150°C. HEALTH & SAFETY SSAFETY The chemicals contained in these kits may be hazardous if improperly handled. Safety equipment: Wear suitable eye protection and clothing, and follow instructions carefully. Reagent spills: If reagent spillage occurs, wipe up immediately and rinse with plenty of water. [. . . ] 9 - Invert each vial several times while still warm, then place them in the HI 740216 rack. Warning: as the vials are still hot, be careful in handling them. C 9800-01 C 9800-02 C 99 C214 HI 740142 HI 740143 HI 740216 HI 740217 ACCESSORIES SSAFETYReactor (115 VAC) Hanna Hanna Reactor (230 VAC) Hanna Photometer (for Laboratories) Hanna Photometer (for Wastewater Treatment Application) 1 mL graduated syringe 1 mL graduated syringe (6 pcs) Test tube cooling rack (25 holes) Laboratory bench safety shield Each kit contains 25 ready-to-use vials with premeasured reagents: just add sample to the vial and tightly cap it before digestion. Different range vials may be easily distinguished by mean of the cap color. SISTRCODR3 01/03 [. . . ]