Candy colors

The absorbance spectra of 10 different candy dyes. The candy dyes that are
measured are E131, E100, E160a, E160e, E132, E163, E120, E162, E141 and the
mixture of E100 and E141. There are two different concentrations from each
color. The first concentration is 5 ul/10 ml H2O and the second one is 20
ul/10 ml H2O. The absorbance spectrum of pure solvent H2O was measured first
so it is possible to isolate the absorption due to dye alone by dividing the
spectrum measured from dye solution by the spectrum measured from the pure
solvent.

Measuring equipment: Hewlet Packard 8452A Diode Array Spectrofotometer.

Wavelength interval: 190 nm - 820 nm.

Wavelength resolution: 2 nm.

File formats:  The available formats are ASCII and MATLAB(tm).

The file candy190_820_2.tar.gz consists of 21 ASCII spectra files. Each candy
spectrum is stored into its own file and the files are named after the candy
dye and the concentration of dye in the solution. For example E131_5.wav means
dye E131 with 5 ul/10ml H2O concentration. The absorbance spectrum of pure
solvent H2O is stored into file blank.wav. One spectrum is measured from 190 nm
to 820 nm with 2 nm interval so there are 316 components in each spectrum.

The file candy_matlab.mat.gz consists of one MATLAB(tm) file that includes two
matrices named as:

	candy		316x21 matrix where spectra are stored in column order.

	S		21x11 matrix where 1st row is the label of 1st spectrum
			in candy matrix, 2nd row is the label of 2nd spectrum
			and so on.

Measurer: haanpalo@lut.fi

Further information: haanpalo@lut.fi

References: 

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