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2. List of reagent testing color charts - Wikipedia

   en.wikipedia.org/wiki/List_of_reagent_testing...

   Reagent test Alcohols: Forms Lucas test in alcohols is a test to differentiate between primary, secondary, and tertiary alcohols. Alkaloids: Forms Froehde Liebermann Mandelin Marquis Mayer's Mecke Simon's: Amines, and amino acids: Forms Folin's: Barbiturates: Class Dille–Koppanyi Zwikker: Benzodiazepines: Class Zimmermann: Phytocannabinoids ...

3. The 10 Best Drinking Water Test Kits You Can Order Online - AOL

   www.aol.com/news/7-best-drinking-water-test...

   Quickly and easily test for commonly found pollutants like lead and copper in your home’s drinking water.

4. APHA color - Wikipedia

   en.wikipedia.org/wiki/APHA_color

   APHA color, also referred to as the Hazen scale, and more appropriately as the Platinum Cobalt(Pt/Co) scale, [1] is a color standard named for the American Public Health Association and defined by ASTM D1209. [2] It was originally intended to describe the color of waste water, but its usage has expanded to include other industrial applications ...

5. Universal indicator - Wikipedia

   en.wikipedia.org/wiki/Universal_indicator

   Paper form: It is a strip of coloured paper which changes colour to red if the solution is acidic and to blue, if the solution is basic. The strip can be placed directly onto a surface of a wet substance or a few drops of the solution can be dropped onto the universal indicator using dropping equipment.

6. List of colors (alphabetical) - Wikipedia

   en.wikipedia.org/wiki/List_of_colors_(alphabetical)

   This is an accepted version of this page This is the latest accepted revision, reviewed on 14 December 2024. For other color lists, see Lists of colors. This article relies largely or entirely on a single source. Relevant discussion may be found on the talk page. Please help improve this article by introducing citations to additional sources. Find sources: "List of colors" alphabetical ...

7. Pt/Co scale - Wikipedia

   en.wikipedia.org/wiki/Pt/Co_scale

   The Platinum-Cobalt Scale (Pt/Co scale or Apha-Hazen Scale) is a color scale that was introduced in 1892 by chemist Allen Hazen (1869–1930). The index was developed as a way to evaluate pollution levels in waste water. It has since expanded to a common method of comparison of the intensity of yellow-tinted samples.