User manual HANNA INSTRUMENTS HI 38061

[. . . ] Read the value in the result window directly in mg/L (or ppm) of Phosphate. To convert this result to mg/L (ppm) of Phosphorus, divide it by 3. 1. 2- Using the pipette, add to each glass vial 10 mL of sample (up to the mark). 10 mL www. hannainst. com SIGNIFICANCE AND USE Phosphorus occurs in natural waters and in wastewaters almost entirely as phosphates (PO43-). Large quantity of phosphate arise from laundering industries as it is used in many cleaning preparations, from soil runoff and sewage. [. . . ] If there is any noticeable damage, notify your Dealer or the nearest Hanna office immediately. Each kit is supplied with: · HI 93713-0 Reagent, packets (100 pcs); · Deionized Water, 1 bottle (500 mL); · 1 checker disc (including a mirror, a mirror holder , the 38061 and the 38073 discs); · 2 glass vials with caps; · 1 plastic pipette (3 mL); · 1 long plastic pipette. Note: Any damaged or defective item must be returned in its original packing materials. 10- Using the pipette, add to each glass vial 7. 5 mL of sample (up to the mark). 7. 5 mL 11- Insert one of them into the left hand opening of the checker disc. This is the blank. PRINTED IN ITALY CHEMICAL REACTION Adaptation of the ascorbic acid method. The reaction between phosphate and the reagent causes a blue tint in the sample. 5- Wait for 3 minutes to allow reaction to occur. 6- Remove the cap and insert the reacted sample into the right hand opening of the checker disc. 12- Add to the other glass vial 1 packet of HI 93713-0 Reagent. Replace the cap and shake vigorously for 20 seconds. This is the reacted sample. ISTR38061 13- Wait for 3 minutes to allow reaction to occur. 14- Remove the cap and insert the reacted sample into the right hand opening of the checker disc. 15- Hold the checker disc so that a light source illuminates the samples from the back of the windows. 21- Use the long plastic pipette to add deionized water up to the 7. 5 mL mark, replace the cap and swirl to mix. REFERENCES APHA, AWWA, WEF, Standard Methods for the Examination of Water and Wastewater, 18th edition, 1992 HEALTH AND SAFETY The chemicals contained in this kit may be hazardous if improperly handled. Read the relevant Health and Safety Data Sheet before performing this test. 16- Keep the checker disc at a distance of 30-40 cm (1216") from the eyes to match the color. Rotate the disc while looking at the color test windows and stop when you find the color match. 17- Read the value in the result window, divide it by 10 and record it in mg/L (or ppm) of Phosphate. To convert this result to mg/L (ppm) of Phosphorus, divide it by 3. 1. 0-50 ppm Phosphate (PO43-) Range: 18- Remove the mirror, if installed, and insert just the 38073 disc as shown in the figure. 7. 5 mL 19- Using the 3 mL pipette, add to one of the glass vials 5 mL of sample (up to the mark) and insert the vial into the left hand opening of the checker disc. [. . . ] When not in use, keep the disc protected from light, in a cool and dry place. Interferences: iron above 5 ppm; copper above 10 ppm; hydrogen sulfide, arsenate and highly buffered samples. 5 mL 20- Using the syringe, add to the other vial 0. 75 mL of sample. Note: To measure exactly 0. 75 mL of sample with the syringe, push the plunger completely into the syringe and insert the tip into sample. [. . . ]