LaMotte HYDROPONICS TEST KIT HP-1 - Manual (Page 3)

NI TRATE NI TRO GEN
The range of the color standards in the Nitrate Nitrogen Color Bar is from
0.25 to 10 ppm Nitrate Nitrogen. If the nutrient solution is above this
range, it should be diluted to bring the readings within the range. The
dilution will depend upon the amount of nitrate in the solution. A 1 to 20
dilution is suggested.
NOTE: Place dispenser cap (0692) on *Mixed Acid Reagent (V-6278).
Save this cap for refill reagents.
1.
Fill a test tube (0106) to the 2.5 mL line with nutrient solution.
2. Add *Mixed Acid Reagent (V-6278) to the test tube to fill to the 5.0
mL line. Cap and mix. Wait two minutes.
3. Use the 0.1 g spoon (0699) to add one level measure (avoid any
excess) of *Nitrate Reducing Reagent (V-6279). Cap and invert the
tube 50-60 times in one minute. Wait 10 minutes.
4. Insert Nitrate Octa-Slide Bar (3413) into Octa-Slide Viewer (1100).
5. Insert the tube into the Octa-Slide Viewer (1100). Match sample
color to a color standard. If the original sample was diluted, multiply
the reading by 20 to obtain the final result in ppm Nitrate Nitrogen.
PHOS PHO RUS
The range of the color standards in the phosphorus comparator is from 3
to 30 ppm Phosphorus. Most nutrient solutions will have to be diluted to
bring the reading within this range. A 1 to 2 dilution is suggested and
involves diluting 5 mL of solution to 10 mL with deionized water.
1.
Fill a test tube (0106) to the 5.0 mL line with nutrient sample.
2. Use the 1.0 mL pipet (0354) to add 1.0 mL of *VM Phosphate
Reagent (4410). Cap and mix. Wait 5 minutes.
3. Insert Phosphorous Octa-Slide Bar (3246) into Octa-Slide Viewer
(1100).
4. Insert test tube into the Octa-Slide Viewer (1100). Match sample
color to a color standard. If the original sample was diluted, multiply
the reading by 2 to obtain the final result in ppm Phosphorus.