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.
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 […]
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.
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).
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.
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 […]
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?”