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  2. pH - Wikipedia

    en.wikipedia.org/wiki/PH

    The measurement of pH can become difficult at extremely acidic or alkaline conditions, such as below pH 2.5 (ca. 0.003 mol/dm 3 acid) or above pH 10.5 (above ca. 0.0003 mol/dm 3 alkaline). This is due to the breakdown of the Nernst equation in such conditions when using a glass electrode. Several factors contribute to this problem.

  3. Analytical chemistry - Wikipedia

    en.wikipedia.org/wiki/Analytical_chemistry

    This allows for the determination of the amount of a chemical in a material by comparing the results of an unknown sample to those of a series of known standards. If the concentration of element or compound in a sample is too high for the detection range of the technique, it can simply be diluted in a pure solvent.

  4. European Pharmacopoeia - Wikipedia

    en.wikipedia.org/wiki/European_Pharmacopoeia

    Cover of the European Pharmacopoeia, 11th Edition. The European Pharmacopoeia [1] (Pharmacopoeia Europaea, Ph. Eur.) is a major regional pharmacopoeia which provides common quality standards throughout the pharmaceutical industry in Europe to control the quality of medicines, and the substances used to manufacture them. [1]

  5. Droplet-based microfluidics - Wikipedia

    en.wikipedia.org/wiki/Droplet-based_Microfluidics

    The reaches of this application have even had effects in aquaculture and economics, as electrochemical sensing has been used to test the freshness of fish rapidly. [301] Use of this detection method is primarily found in the electrowetting of dielectric DMFs, where the sensing electrode apparatus can be reconfigurable and has a longer lifetime ...

  6. ISO/IEC 15504 - Wikipedia

    en.wikipedia.org/wiki/ISO/IEC_15504

    ISO/IEC 15504 is the reference model for the maturity models (consisting of capability levels which in turn consist of the process attributes and further consist of generic practices) against which the assessors can place the evidence that they collect during their assessment, so that the assessors can give an overall determination of the organization's capabilities for delivering products ...

  7. Student's t-distribution - Wikipedia

    en.wikipedia.org/wiki/Student's_t-distribution

    In the English-language literature, the distribution takes its name from William Sealy Gosset's 1908 paper in Biometrika under the pseudonym "Student". [26] One version of the origin of the pseudonym is that Gosset's employer preferred staff to use pen names when publishing scientific papers instead of their real name, so he used the name ...

  8. Mercury (planet) - Wikipedia

    en.wikipedia.org/wiki/Mercury_(planet)

    The planet's density is the second highest in the Solar System at 5.427 g/cm 3, only slightly less than Earth's density of 5.515 g/cm 3. [4] If the effect of gravitational compression were to be factored out from both planets, the materials of which Mercury is made would be denser than those of Earth, with an uncompressed density of 5.3 g/cm 3 ...

  9. 2016 United States presidential election - Wikipedia

    en.wikipedia.org/wiki/2016_United_States...

    2016 United States presidential election ← 2012 November 8, 2016 2020 → 538 members of the Electoral College 270 electoral votes needed to win Opinion polls Turnout 60.1% (1.5 pp) Nominee Donald Trump Hillary Clinton Party Republican Democratic Home state New York New York Running mate Mike Pence Tim Kaine Electoral vote 304 [a] 227 [a] States carried 30 + ME-02 20 + DC Popular vote ...