Phosphate Test Kit


Why Test for Phosphate?
Phosphate (PO43–) enters the aquarium from fish and invertebrate waste and decaying organic matter, such as dead algae and uneaten fish food.
Water treatment facilities may add phosphate to tap water to prevent pipe corrosion and reduce concentrations of heavy metals in drinking water.
Some salt mixes also contain phosphates. Excess phosphate may lead to algae blooms.
In saltwater aquariums, phosphate precipitates dissolved calcium (Ca2+) and magnesium (Mg2+) ions, inhibiting the growth of hard corals and other reefbuilding organisms.

Packing Size:

1.00 Complete SET



This is applicable to laboratory analysis particularly in the determination of water pollution. Such an analytical test may be either qualitative or quantitative.

This test kit reads the total phosphate level in parts per million (ppm), which are equivalent to milligrams per liter (mg/L) from 0 – 50.0 ppm (mg/L).

Testing Procedure :::— A Quantitative method to determine the amount of phosphate present in samples such as boiler feedwater is as follows

1. Rinse a clean test tube with water being tested.
2. Fill the test tube with 2.5 ml of water to be tested (to the line on the tube).
3. Holding the bottle vertically, add 20 drops from RXSOL TK LP1 solution. Cap the test tube and shake vigorously for 5 seconds.
4. Now, holding the bottle vertically, add 5 drops from RXSOL TK LP2 Test Solution . Note: RXSOL TK LP2 contains a very thick solution and may require increased pressure to release drops.
5. Cap and shake the test tube vigorously for 5 seconds.
6. Wait 3 minutes for color to develop
7.Rinse the 10 ml glass jar with above solution & fill it up to 10 ml mark.
8. place the glass test jar on colour card & match with various shade of colour .
8. Read the test results by comparing the color of the solution to the appropriate Phosphate Color Card (choose either Freshwater or Saltwater). The tube should be viewed in a well light area against the white area of the card. The closest match indicates the ppm (mg/L) of total phosphate (PO43–) in the water sample. Rinse the test tube with clean water after use.


GENERAL TIPS :::— A small amount of the sample is acidified with Concentrated Nitric Acid to which a little ammonium molybdate is added. The presence of Phosphate Ions is indicated by the formation of a bright yellow layer.


Abnormally high levels of phosphate can lead to organ damage due to calcification (calcium phosphate deposits in organs, such as the kidneys).
Phosphate levels are normally higher in young children than in adults because their bones are actively growing. Low phosphate levels in children can inhibit bone growth. Very low levels of phosphate are rare but require swift medical attention.

Soft drinks and pre-packaged food items are high in phosphate content, sometimes as phosphoric acid, which some nutritionists believe contributes to over consumption of phosphorus.
Test results may be affected by the use of enemas and laxatives containing sodium phosphate, excess Vitamin D supplements, and by intravenous glucose administration.