Colour Measurement Drink challenge.
Modern day drinks, whether soft or alcoholic, are being produced in non-standard colours and existing technology is not capable of providing a “true measure” of colour that can quantify quality decisions. Hours are spent “decanting” the sample.
THE CAUSE: Over the years analysis has always been carried out on standard colours. Beer is typically a brown colour and soft drinks mimic that of their natural counter parts. These samples are typically measured on a UV analytical spectrophotometer to give an approximation of what the colour is; not factoring in a viewing illuminant or observer or whether the sample should be measured in reflectance or transmittance. Quality control has often been a visual check as these spectrophotometers are not able to measure the thick, “turbid” and opaque samples.
Drink Manufacturers are also producing different colour drinks so the original, single wavelength approach will no longer work as the dominant wavelength has changed.