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  2. Phosphate test - Wikipedia

    en.wikipedia.org/wiki/Phosphate_test

    Phosphate test. Phosphate (PO4 3-) test. Classification. Colorimetric method. Analytes. Phosphate. A range of qualitative and quantitative tests have been developed to detect phosphate ions (PO3− 4) in solution. Such tests find use in industrial processes, scientific research, and environmental water monitoring.

  3. Sodium hexametaphosphate - Wikipedia

    en.wikipedia.org/wiki/Sodium_hexametaphosphate

    Sodium hexametaphosphate (SHMP) is a salt of composition Na6[ (PO3)6]. [3] Sodium hexametaphosphate of commerce is typically a mixture of metaphosphates (empirical formula: NaPO 3), of which the hexamer is one, and is usually the compound referred to by this name. Such a mixture is more correctly termed sodium polymetaphosphate.

  4. Phosphorus cycle - Wikipedia

    en.wikipedia.org/wiki/Phosphorus_cycle

    The phosphorus cycle is the biogeochemical cycle that involves the movement of phosphorus through the lithosphere, hydrosphere, and biosphere.Unlike many other biogeochemical cycles, the atmosphere does not play a significant role in the movement of phosphorus, because phosphorus and phosphorus-based materials do not enter the gaseous phase readily, [1] as the main source of gaseous phosphorus ...

  5. Total dissolved solids - Wikipedia

    en.wikipedia.org/wiki/Total_dissolved_solids

    Total dissolved solids (TDS) is a measure of the dissolved combined content of all inorganic and organic substances present in a liquid in molecular, ionized, or micro-granular (colloidal sol) suspended form. TDS are often measured in parts per million (ppm). TDS in water can be measured using a digital meter.

  6. Urine-indicator dye - Wikipedia

    en.wikipedia.org/wiki/Urine-indicator_dye

    Urine-indicator dye. Urine-indicator dye is a mythical substance that is supposed to be able to react with urine to form a colored cloud in a swimming pool or hot tub, thus indicating the location of people who are urinating while they are in the water. [1][2] A 2015 report from the National Swimming Pool Foundation called this "the most common ...

  7. Sodium triphosphate - Wikipedia

    en.wikipedia.org/wiki/Sodium_triphosphate

    Sodium triphosphate (STP), also sodium tripolyphosphate (STPP), or tripolyphosphate (TPP), [1]) is an inorganic compound with formula Na 5 P 3 O 10. It is the sodium salt of the polyphosphate penta-anion, which is the conjugate base of triphosphoric acid. It is produced on a large scale as a component of many domestic and industrial products ...