#### 8.2.58.24 tblish.dataset.Formaldehyde ¶

Static Method: `out =` Formaldehyde `()` ¶

  Determination of Formaldehyde

  #### Description ¶

  These data are from a chemical experiment to prepare a standard curve for the determination of formaldehyde by the addition of chromatropic acid and concentrated sulphuric acid and the reading of the resulting purple color on a spectrophotometer.

  #### Format ¶

  `record`

    Observation record number.

  `carb`

    Carbohydrate (ml).

  `optden`

    Optical Density

  #### Source ¶

  Bennett, N. A. and N. L. Franklin (1954). Statistical Analysis in Chemistry and the Chemical Industry. New York: Wiley.

  #### References ¶

  McNeil, D. R. (1977). Interactive Data Analysis. New York: Wiley.

  #### Examples ¶

      t = tblish.dataset.Formaldehyde;

      figure
      scatter (t.carb, t.optden)
      # TODO: Add a linear model line
      xlabel ("Carbohydrate (ml)")
      ylabel ("Optical Density")
      title ("Formaldehyde data")

      # TODO: Add linear model summary output
      # TOD: Add linear model summary plot