User manual HANNA INSTRUMENTS HI 38049

[. . . ] Instruction Manual SPECIFICATIONS Range 0. 0 to 3. 0 mg/L (ppm) as NH3-N Smallest Increment 0. 1 mg/L (ppm) NH3-N Analysis Method Colorimetric Sample Size 5 mL Number of Tests 100 Case Dimensions 165x150x38 mm (6. 5x5. 9x1. 5") Shipping Weight 248 g (8. 7 oz. ) · Keep the checker disc at a distance of 30-40 cm (1216") to match the color. It is better to match the color with a white sheet on the background. [. . . ] It will provide you with the necessary information for correct use of the kit. If you need additional information, do not hesitate to e-mail us at tech@hannainst. com. Remove the chemical test kit from the packing material and examine it carefully to make sure that no damage has occurred during shipping. If there is any noticeable damage, notify your Dealer or the nearest Hanna office immediately. Each kit is supplied with: · Ammonia Reagent 1 for Fresh Water, 1 bottle with dropper (20 mL); · Nessler Reagent, 1 bottle with dropper (20 mL); · 1 checker disc (containing the 38049 disc); · 2 glass vials with caps; · 1 plastic pipette (3 mL). Note: Any damaged or defective item must be returned in its original packing materials. CHEMICAL REACTION x 4 Ammonia reacts with the reagent in basic solution to form a yellow compound. The absorbance of this colored product is proportional to the concentration of ammonia-nitrogen present in the aqueous sample. · Wait for 5 minutes to allow color to develop. This is the reacted sample. · To convert the reading to mg/L of Ammonia (NH3), multiply it by a factor of 1. 214. For best results: Perform the reading three times and take the average value (divide by 3 the sum of the three numbers). Intensely colored samples will make the color matching difficult and they should be adequately treated before performing the test. Suspended matter in large amounts should be removed by prior filtration. [. . . ] · Hold the checker disc so that a light source illuminates the samples from the back of the windows. 01/05 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. m L 5 [. . . ]