Blogs
How do I measure the color of semi-solid materials?
Posted on by Ganesh Ramanathan
One thing to keep in mind when measuring creams, gels, pastes, and other semi-solid materials is to maintain a consistent sample thickness. One option is to “sandwich” a fixed quanity of your semi-solid material in a suitable clear-bottomed container, so that it can be placed at the port for measurement.
How do I measure “clear and colorless” Surfactants?
Posted on by Ganesh Ramanathan
FAQ: “We are in touch with a pharmaceutical company which is looking for a spectrophotometer to measure the color and appearance of cationic surfactants. Can you provide any information on this topic?” Surfactants reduce the surface tension of a liquid as in the use of a dish detergent; the interfacial tensions between two liquids such as in the case of […]
APHA/Pt-Co/Hazen vs Gardner color scales: What’s the difference?
Posted on by Ganesh Ramanathan
The APHA/Pt-Co/Hazen and Gardner visual color scales were both originally based on liquid chloroplatinate color standards but have different history and intended use.
Where does one find the EP (European Pharmacopoeia) Liquid Color Matching Standards?
Posted on by Ganesh Ramanathan
EP – European Pharmacopoeia Color is a visual liquid color scale used primarily in the pharmaceutical industry. It consists of 3 primary color standard solutions (yellow, red and blue) mixed with hydrochloric acid to make 5 standard color solutions – B (brown), BY (brownish-yellow), Y (yellow), GY (greenish-yellow) and R (red).
What Fuse Protection is in place with HunterLab Instruments?
Posted on by Ganesh Ramanathan
All HunterLab instruments have fuses built into the main circuitry to protect the instrument against unusual and unexpected changes in voltage that could damage the electrical components.
Can Power Supplies in HunterLab Instruments be used everywhere?
Posted on by Ganesh Ramanathan
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 […]
What Path Length Cell should I use for APHA/Pt-Co/Hazen Color Measurement?
Posted on by Ganesh Ramanathan
FAQ: ” We are currently using a 10 mm path length and read in the 0 – 50 region for APHA/Pt-Co/Hazen Color, usually in the area of 10. Would you recommend a 10 mm path length with our equipment for this application?”