Therefore, to use a particle size analyzer to test, you first need to determine the refractive index of the sample. The average user does not know the exact parameters of the refractive index of the product to be measured. (According to the search, there is currently no instrument that can accurately measure the refractive index of the powder. It only shows the refractive index of the substance, not the refractive index of the powder, there is a big difference between the two), so you have to choose one randomly for the calculation, and if the calculation is not satisfactory, then change the other. How accurate is such a refractive index, is it not doubtful?
In fact, the research results show that the accuracy of particle size measurement is not only related to the refractive index, but also related to the particle shape, particle surface state, and particle concentration. The influence of the latter two is not less than that of the former. For this reason, Micron Instruments not only prepares 16 models with different refractive indexes, but also provides special software for the comprehensive calibration of particle size. In order to be responsible to the user and not cause illusion to the user, Weina did not indicate the refractive index in the test report, because the refractive index does not accurately represent the characteristics of the sample. It is just a model code used in the calculation.
Some people say: The absence of refractive index in the test report is not Mie theory, this statement is not comprehensive. Some instruments use the Fraunhofer diffraction theory (such as the German Semtech), of course, no refractive index is required. Although some instrument companies use Mie theory, they are unwilling to indicate the refractive index due to the consideration of the user. Obviously Weina belongs to the latter.
The CAS Registry number of Poly(L-lactic acid) PLLA is 33135-50-1. It is white powder. We can provide Intrinsic viscosity from 0.30-2.25 dl/g, Mw from 6000-30000.
For each batch a certificate of analysis is provided, showing the analytical data determined in our quality control laboratory. Additional analytical data can be made upon request.
When stored in the original packaging at low temperatures (2-8°C), PLLA keeps its initial properties for at least two years.
Rimless Industry Co., Ltd. (RIMLESS) is devoted to the global brand operating and integrating, sale and after-sale services of biomedical materials, high-end medical devices, regenerative aesthetic products,cosmetics and beauty tools.
RIMLESS is the exclusive distributor, exporter and global brand licensor of REBORN. We take REBORN and RIMLESS as the core brands, biomedical materials and their applications in the medical field as the main business, and the high-end medical devices as the research and development direction.
We have exported over 50 countries and areas in the world and won a very good reputation and long-term partnership with our customers.
Poly L-Lactic Acid Plla,Biodegradable Polylactic Acid,Polylactic Acid Material,Biodegradable Polylactic Acid Plla
Rimless Industry Co.,Ltd. , https://www.rebornplla.com