Lycopene is the ‘redness” found in tomato products.
In fresh red tomatoes, Lycopene occurs as the major pigment (Lycopersicon esculentum, 85 – 90%). Other pigments present are beta-carotene (10- 15%) and small quantities of about 10 other varieties of carotenoids. The outer skin of the tomato contains the highest concentration of lycopene.
HunterLab manufactures bench top instruments with two different geometry types: directional 45/0 (or 0/45) and diffuse sphere instruments, as discussed in a previous blog note. A 45/0 directional instrument illuminates the sample at a 45˚ angle from the sample surface and the detector is located 0˚ in line perpendicular to the sample surface. The inverse, 0˚ illumination and detection at 45˚, can also be used and yields equivalent measurements. The MiniScan EZ and ColorFlex EZ instruments are 45/0 instruments and the LabScan XE is a 0/45 instrument. Continue reading →
FAQ: “We need to take our LabScan XE instrument to Germany for some plant trial testing. Our machine is a US spectrophotometer 110v unit and, obviously, the power supply in Germany is 220v. The label on the back of the instrument says ‘110v-220v’, which sounds a little ambiguous to me. Do we need a voltage transformer or can we get away with only using a plug adapter (does not step down current from 220v, only changes plug shape)? We don’t want to ruin our baby!” Continue reading →