FAQ
【UV】What is the UV light irradiance of UV-1047Xe?
With xenon arc lamp (containing Hg), the UV irradiance at the end of the optical fiber is 60 mW/cm2 (600 W/m2) at 365 nm and 700 mW/cm2 (7000 W/cm2) in the range of 280 – 450 nm.
* Irradiance is defined as radiant flux incident on unit area of a surface.
【UV】How can I select the type of light source of UV-1047Xe?
Xenon (contains Hg) light source is standard, but you can choose an optional light source without Hg. The light spectrum of the lamp without Hg is similar to the one of the Sun; however, you can use the standard lamp for your tests without problems. Note that the UV irradiance of the lamp without Hg is approximately 1/10 of the lamp with Hg.
【UV】What is the major difference between UV-1045E and UV-1047Xe?
UV-1045E uses a deuterium lamp for the light source and the lamp emits UV light with wavelengths between 210 and 400 nm which are not included in the actual Sun light spectrum. On the other hand, The UV irradiance of UV-1047Xe is approximately 2000 times stronger than that of UV-1045E which uses a deuterium lamp. and has intense emission lines of Hg, in addition to the spectrum generated by xenon. The light intensity can be adjusted in the range between 1 to 100 %.
【UV】How long should I irradiate polymer samples in a UV degradation study using micro UV irradiator?
Using UV-1047Xe, volatile degradation products are generally observed in UV irradiation of one hour. On the other hand, when UV-1045E is used, several times longer irradiation is needed due to the lower irradiance, depending on the type of polymers.
【UV】I would like to evaluate the degradation of polymers. How can I determined the irradiation time?
Many polymers exhibit volatile degradation products upon one hour irradiation of UV light. We recommend that you start with one hour irradiation, and increase or decrease the irradiation time depending on the results obtained. Also, depending on the amount and characteristics of the sample, the irradiance can be too strong, if so decrease the irradiation power (1 – 100 %).
【UV】I would like to study polymer degradation. What should be the form of polymer samples?
If the polymer is soluble in a solvent, dissolve it in that solvent and place a few micro-litter of the solution in a sample cup for a good reproducibility. Samples in the form of powder or sheet can be used. For a sheet-like polymer, use Micro Puncher to punch out to discs of 0.5 to 2 mm in diameter.
【UV】The end of the optical fiber is prone to contaminations. What kind of maintenance is required?
After prolonged use, the end of optical fiber cable can be contaminated. Clean the end with a solvent such as methanol, ethanol, dichloromethane, etc. Take extra care not to damage the end of the fiber cable. If the fiber cable is broken, it needs to be replaced with a new fiber cable (P/N: UV1-7012, set of two cables per order).
【UV】When cryo-trapping volatile compounds, how much liquid nitrogen will be consumed at each measurement?
Approximately 25 mL of liquid nitrogen is consumed in one hour. Depending of the room temperature, 350 mL of liquid nitrogen in a Dewar lasts 8 to 12 hours.
【UV】Is there any safety precautions in continuous use of light source?
There is no special precautions; however, turn off the power only after cooling the unit with the cooling fan for 10 minutes or more. See also the operation manual.
【UV】What is the useful life of the UV lamp?
The useful life of the lamp is 3000 hours. At 3000 hours of use, the light intensity becomes approximately 60 % of the initial value at 365 nm.