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  2. Phosphate test - Wikipedia

    en.wikipedia.org/wiki/Phosphate_test

    A simple qualitative method to determine the presence of phosphate ions in a sample is as follows. 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 precipitate layer of ammonium phosphomolybdate ...

  3. Analysis of water chemistry - Wikipedia

    en.wikipedia.org/wiki/Analysis_of_water_chemistry

    An EPA scientist samples water in Florida Everglades. Samples of water from the natural environment are routinely taken and analyzed as part of a pre-determined monitoring program by regulatory authorities to ensure that waters remain unpolluted, or if polluted, that the levels of pollution are not increasing or are falling in line with an agreed remediation plan.

  4. Freshwater environmental quality parameters - Wikipedia

    en.wikipedia.org/wiki/Freshwater_environmental...

    Freshwater environmental quality parameters are those chemical, physical and biological parameters that can be used to characterise a freshwater body. Because almost all water bodies are dynamic in their composition, the relevant quality parameters are typically expressed as a range of expected concentrations.

  5. Molybdovanadate reagent - Wikipedia

    en.wikipedia.org/wiki/Molybdovanadate_reagent

    It is commonly used in the determination of phosphate ion content. [1] [2] The reagent used is ammonium molybdovanadate with the addition of 70% perchloric acid (sulfuric acid is also known to be used). [citation needed] It is used for purposes such as the analysis of wine, canned fruits and other fruit-based products such as jams and syrups ...

  6. Buffer solution - Wikipedia

    en.wikipedia.org/wiki/Buffer_solution

    The majority of biological samples that are used in research are kept in a buffer solution, often phosphate buffered saline (PBS) at pH 7.4. In industry, buffering agents are used in fermentation processes and in setting the correct conditions for dyes used in colouring fabrics. They are also used in chemical analysis [5] and calibration of pH ...

  7. Washington DC reporter Derrick Ward dies at 62: An ... - AOL

    www.aol.com/washington-dc-reporter-derrick-ward...

    Derrick Ward Sr., a reporter at NBC4 Washington, died Tuesday from complications after a recent cardiac arrest, his family confirmed.

  8. Bears drop 5th straight game in OT heartbreaker to Vikings as ...

    www.aol.com/sports/bears-drop-5th-straight-ot...

    Five plays later, Aaron Jones extended the Vikings lead to 24-10 with a 2-yard touchdown run. Chicago eventually answered with two touchdowns in the fourth quarter and the game-tying field goal as ...

  9. Colorimetric analysis - Wikipedia

    en.wikipedia.org/wiki/Colorimetric_analysis

    Colorimetric analysis is a method of determining the concentration of a chemical element or chemical compound in a solution with the aid of a color reagent.It is applicable to both organic compounds and inorganic compounds and may be used with or without an enzymatic stage.