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 sulpuric acid and the reading of the resulting purple color on a spectophotometer.

Usage

data(Formaldehyde)

Format

A data frame with 6 observations on 2 variables.

[,1]	carb	numeric	Carbohydrate (ml)
[,2]	optden	numeric	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

require(stats)
data(Formaldehyde)
plot(optden ~ carb, data = Formaldehyde,
     xlab = "Carbohydrate (ml)", ylab = "Optical Density",
     main = "Formaldehyde data", col = 4, las = 1)
abline(fm1 <- lm(optden ~ carb, data = Formaldehyde))
summary(fm1)
opar <- par(mfrow = c(2,2), oma = c(0, 0, 1.1, 0))
plot(fm1)
par(opar)