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  2. Arthur Thomas Palin - Wikipedia

    en.wikipedia.org/wiki/Arthur_Thomas_Palin

    Arthur Thomas Palin (b. 16 October 1916 - 2006) was a British chemist and bacteriologist. [2] As well as inventing the DPD method of detecting chlorine in water [1] and working as an official advisor to the American Water Works Association (AWWA), Palin was responsible for what the Manual of British Water Engineering Practice records as one of the key historical developments, when breakpoint ...

  3. Reactions to the 2008 Sichuan earthquake - Wikipedia

    en.wikipedia.org/wiki/Reactions_to_the_2008...

    Palintest donated $71,000 worth of water quality testing and reagents [106] Prudential (Taiwan) donated $98,000 [106] Standard Chartered (Hong Kong) donated $64,000 [106] PricewaterhouseCoopers donated $503,000 [106] Reed Expo donated $143,000 [106] Tesco donated $287,000 and will match staff donations totaling $71,000 [106] Unilever donated $1 ...

  4. Hach Company - Wikipedia

    en.wikipedia.org/wiki/Hach_Company

    Hach Company manufactures and distributes analytical instruments and reagents used to test the quality of water and other liquid solutions. Manufactured and distributed worldwide, Hach systems are designed to simplify analysis by offering on-line instrumentation, portable laboratory equipment, prepared reagents, easy-to-follow methods, and technical support.

  5. Diphenylcarbazide - Wikipedia

    en.wikipedia.org/wiki/Diphenylcarbazide

    Diphenylcarbazide is a white solid that is scarcely soluble in water, [3] but readily soluble in organic solvents like acetone, hot ethanol and acetic acid. [4] It forms colored complex compounds with certain metal ions.

  6. Diethylhydroxylamine - Wikipedia

    en.wikipedia.org/wiki/Diethylhydroxylamine

    Diethylhydroxylamine (DEHA) is an organic compound with the formula (C 2 H 5) 2 NOH. Strictly, this is N,N-diethylhydroxylamine.It has an isomer, N,O-diethylhydroxylamine with the formula EtNHOEt.

  7. Carbazide - Wikipedia

    en.wikipedia.org/wiki/Carbazide

    In chemistry, a carbazide is a functional group with the general formula RNH-NH(C=O)NH-NHR. They can be derived from the condensation of carbonic acid with a hydrazine. ...

  8. International Tea Day - Wikipedia

    en.wikipedia.org/wiki/International_Tea_Day

    International Tea Day is observed annually on May 21, according to the United Nations. [1] The concerning resolution was adopted on December 21, 2019, and calls on the United Nations Food and Agriculture Organization (FAO) to lead the observance of the Day.

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