|
Test |
Tablet |
Composition |
Chemistry |
|
pH |
Soil pH TesTab |
Mixed pH Indicators, Fillers, Tableting Aids, Flocculant |
Indicators are sensitive to pH and change to a specific color at a certain pH. A flocculant increases the speed at which soil will settle out of solution. |
|
Extraction |
Floc-Ex TesTab |
All ingredients are proprietary |
When the tablet is dissolved in water, an acid, like weak vinegar is produced. The cloudiness is due to a filler which also aids flocculation. (Regular vinegar could not be used as an extracting solution because store brands contain phosphorus.) |
|
Nitrogen |
Nitrate WR CTA |
Chromotropic Acid, Zinc, Sulfamic Acid, all other ingredients are proprietary |
Zinc reduces the nitrate to nitrite. The indicator, Chromotropic Acid, reacts proportionally to the amount of nitrite to form a red color. |
|
Potassium |
Potassium TesTab |
Sodium Tetraphenylboron, all other ingredients are proprietary |
Sodium Tetraphenylboron reacts with potassium to form a white precipitate in proportion to the potassium concentration. |
|
Phosphorus |
Phosphorus TesTab |
Ammonium Molybdate, Ascorbic Acid, all other ingredients are proprietary |
Ammonium molybdate reacts with phosphorus to form a phospho-molybdate complex. This complex is reduced to a blue complex by ascorbic acid. The color is proportional to the amount of phosphorus in the extract. |