Colombo Marine Calcium Test

Professional drop test for precise determination of Calcium content in seawater. The handy visualised instructions for use, included test tubes and accessories make testing easy. Titration test set, simplify testing by using the Colombo test stirrer. Depending on the CA value, the contents of the package are on average sufficient for 40 tests.
General Guidelines
• Ensure the test tube is clean before use.
• Clean the tube directly after use.
• Take the volume of the water sample as precisely as possible.
• Keep the dripping bottle perfectly vertical during dripping.
• Take care that no air bubbles are included in the drops.
Test procedure:
1. Take a water sample of 5 ml.
2. Add 5 drops of Ca-1 fluid and mix, a white deposit should precipitate on the bottom of the test tube.
3. Add 1 scoop Ca-2 test powder (green tube) and shake the test tube; the water sample becomes dark red – red purple of colour.
4. Mount the plastic tip onto the 1 ml syringe and fill the syringe with 1 ml Ca-3 test fluid. Above the fluid an air bubble will appear, this is normal. The air compensates for the volume in the tip. Add the fluid slowly until the water sample colours blue.
5. The numbers of ml what was needed to let the colour convert from red/purple to blue gives the Calcium content according to the information in the chart. You can also calculate the Calcium content by multiplying the qty of ml by 500. E.g. 0,7 ml needed to convert from Red / Purple to Blue = 0,7 x 500 = 350 mg Calcium per litre.
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