@subsubheading 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.

@subsubheading Format

@table @code
@item record
Observation record number.
@item carb
Carbohydrate (ml).
@item optden
Optical Density
@end table

@subsubheading Source

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

@subsubheading References

McNeil, D. R. (1977). @cite{Interactive Data Analysis}. New York: Wiley.

@subsubheading Examples

@example
@INCLUDE_DATASET_EXAMPLE_SCRIPT{Formaldehyde_1.m}
@end example
