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  2. Calibration curve - Wikipedia

    en.wikipedia.org/wiki/Calibration_curve

    A calibration curve plot showing limit of detection (LOD), limit of quantification (LOQ), dynamic range, and limit of linearity (LOL).. In analytical chemistry, a calibration curve, also known as a standard curve, is a general method for determining the concentration of a substance in an unknown sample by comparing the unknown to a set of standard samples of known concentration. [1]

  3. Standard solution - Wikipedia

    en.wikipedia.org/wiki/Standard_solution

    A calibration curve is obtained by measuring a series of standard solutions with known concentrations, which can be used to determine the concentration of an unknown sample using linear regression analysis. [12] For example, by comparing the absorbance values of a solution with an unknown concentration to a series of standard solutions with ...

  4. Internal standard - Wikipedia

    en.wikipedia.org/wiki/Internal_standard

    The calibration curve that does not use the internal standard method ignores the uncertainty between measurements. The coefficient of determination (R 2) for this plot is 0.9985. In the calibration curve that uses the internal standard, the y-axis is the ratio of the nickel signal to the yttrium signal.

  5. Job plot - Wikipedia

    en.wikipedia.org/wiki/Job_plot

    A simple Job Plot showing how a physical property (P) changes upon changing the mole fraction of compound A (Χ A).. In solutions where two species are present (i.e. species A and species B), one species (A) may bind to the other species (B).

  6. Standard addition - Wikipedia

    en.wikipedia.org/wiki/Standard_addition

    Using the calibration curve method, the analyst can calibrate the spectrometer with a pure silver aqueous solutions, and use the calibration graph to determine the amount of silver present in the waste samples. This method, however, assumes the pure aqueous solution of silver and a photographic waste sample have the same matrix and therefore ...

  7. Analytical chemistry - Wikipedia

    en.wikipedia.org/wiki/Analytical_chemistry

    A calibration curve plot showing limit of detection (LOD), limit of quantification (LOQ), dynamic range, and limit of linearity (LOL) A general method for analysis of concentration involves the creation of a calibration curve. This allows for the determination of the amount of a chemical in a material by comparing the results of an unknown ...

  8. Bluesky has added 1 million users since the US election as ...

    www.aol.com/bluesky-added-1-million-users...

    Social media site Bluesky has gained 1 million new users in the week since the U.S. election, as some X users look for an alternative platform to post their thoughts and engage with others online.

  9. Gran plot - Wikipedia

    en.wikipedia.org/wiki/Gran_plot

    The Gran plot is based on the Nernst equation which can be written as = + ⁡ {+} where E is a measured electrode potential, E 0 is a standard electrode potential, s is the slope, ideally equal to RT/nF, and {H +} is the activity of the hydrogen ion.