Color Measurements with Spectroquant® Prove

Life is colorful, measure it using the Spectroquant® Prove spectrophotometer

Methods for Color Measurement Manual

The color of a sample is often one of the first properties we assess. It can give us a first indication of the quality of a product or of any potential contamination. While for some products, such as drinking water, any given discoloration is undesirable, other products are meant to have a specific color (e.g. soft drinks or olive oil), and in some cases the color is the product, as is the case for dyes or paints.

Although the human eye is very sensitive to color changes, the differences in perception of colors between people might lead to significant variances in the assessment and interpretation of a sample’s color. Photometric color measurement is a powerful alternative that allows the objective, reliable and reproducible quantification of colors.

Methods for color measurement

Our Spectroquant® Prove spectrophotometers allow accurate color measurements with over 30 preprogrammed color measurements incl. methods such the Gardner color measurement or the Anisidine value.

See examples of the broad range of color measurement methods and areas of application in the excerpts below.

 
Parameter Standard Sample material Measuring range Method principle Photometer Method No.
ADMI color measurement APHA 2120 F Liquid
samples
2.0 - 100.0 ADMI
10 - 600 ADMI
10 - 1000 ADMI
Transmittances
from 400 - 700 nm
2518
2517
2516
Anisidine value ISO 6885,
DGF C-VI 6e
Animal and vegetable
fats and oils
0.0 - 200.0 AV Color comparison
at 350 nm
2584
ASTM color
measurement
ASTM D6045 Liquid
samples, petroleum products
0.5 - 8.0 ASTM Transmittances
from 380 - 780 nm
2562
CIE color
distance
DIN EN 11664-4,
DIN 5033-3
Liquid
samples
ΔE*ab 0.00 - 200.00
ΔL* -200.00 - 200.00
Δa*-200.00 - 200.00
Δb*-200.00 - 200.00
ΔC*ab -200.00 - 200.00
Comparative measurement
of transmittances from 360 - 780 nm
2584
CIELAB color
space (brightness, chroma)
DIN EN 11664-4,
DIN 5033-3
Liquid
samples
ΔE*ab 0.00 - 200.00
ΔL* -200.00 - 200.00
Δa*-200.00 - 200.00
Δb*-200.00 - 200.00
ΔC*ab -200.00 - 200.00
Comparative measurement of
transmittances from 360 - 780 nm
2584

Table 1. Excerpt - Color Measurement Methods

 
    Beer Sugar Fat & oils Paints & coating materials Water from wastewater-treatment plants
Parameter Samples Food and Beverage Industry Water
ADMI color measurement Liquid samples         X
Anisidine value Animal and vegetable fats and oils     X    
ASTM color measurement Liquid samples, petroleum products          
CIE color distance Liquid samples       X  
CIELAB color space (brightness, chroma) Liquid samples       X  
CIELUV color space Liquid samples       X  
CIExyY color space Liquid samples       X  
Color (ASBC method) Beers, worts, liquid malt substitutes X        
Color (EBC method) Beers, worts, liquid malt substitutes X        
Color Hazen           X
340 nm Yellow to yellow-brownish liquid samples          
445 nm Yellow to yellow-brownish liquid samples     X X X

Table 2. Excerpt - Areas of Application