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Featured Products

Why Choose EPRUI

EPRUI Biotech Co. Ltd. supplies various polymer HPLC packing materials including Polystyrene divinylbenzene or PS-DVB reverse phase chromatography(RPC) packing material, ion exchange chromatography column packing material, Solid phase extraction(SPE) chromatography packings, sulfonated PS/DVB resins for separation and analysis of sugar… The polymer HPLC column packing materials from EPRUI is made of monodisperse microspheres with narrow particle size distribution such as high crosslinked PS/DVB microbeads, monodisperse PMMA microspheres and so on.
Polystyrene divinylbenzene or PS-DVB microspheres are robust polymer material used as the base framework for most EPRUI’s polymer HPLC packing materials. The high degree of cross-linking with divinylbenzene makes the polymer bead extremely durable for high pressure applications. Compared with silica microspheres, PS/DVB resins have greater features as below.
1. Can handle pressures over 5,000 psi
2. Have a usable pH range of 1‐13
3. Polymer columns can be cleaned with 1.0 M sodium hydroxide to remove strongly retained material.
4. Swelling in organic solvents such as THF or chloroform is negligible because of the cross‐linking
5. Can be operated at much higher temperatures as compared to silica based materials
6. Excellent sample recoveries due to the lack of acidic silanol groups
7. PS-DVB resins are similar in retention characteristics to a C18 but do have a slightly different selectivity in some cases.
Besides, we can also supply size controllable magnetic beads which are easy to disperse and has good super paramagnetic effect and biocompatibility. By linking different functional groups such as –NH2,-OH,-COOH, epoxy groups, etc, magnetic beads can be widely used in the industries of clinical diagnosis, biological imaging, target drug delivery, cell screening, immunoassay, and especially protein, antibody, DNA/RNA/ nucleic acid purification.

1.     Precise particle size
2.     Narrow particle size distribution
3.     Perfect spherical morphology
4.     Optimized pore size
Based on the same or even better quality, we offer much more competitive price than domestic and overseas rivals.
EPRUI was established by a group of leading scientists in chromatography industry, most are overseas returnees thus have great academic background. Chief scientist Dr. Yangchenli who is also the co-founder, has biomedical scholar background in Peking University in China and Georgetown University in the USA, which ensures EPRUI’s micropearl products as good as made in the USA. By cooperating with top research institutes and universities worldwide, including Harvard Medical School Department of Genetics, MIT, China Academy of Science, QsingHua University, Peking University, EPRUI is able to provide the best and widest range of monodisperse microspheres.
If you are not satisfied with our product
30 days unconditional return policy is accepted, No questions asks, PERIOD
Further more, if it proves to be our problem, EPRUI will arrange a free redelivery
If order above USD$1000, we offer free delivery service.
EPRUI offers customization service for special requirement of particle size. E.x. EPRUI once customizes 120-210um highly crosslinked PS/DVB microspheres for a Taiwan customer. Besides, EPRUI can control the particle size and pore size according to the customers’ feedback. EPRUI is able to customize surface modification and functionalization of uniform microspheres. We have earned rich experiences in surface chemistry technology, particularly in the modification and functionalization of hydrophobic surface of polymer microsphere into hydrophilic surface to eliminate non-specific binding. We also provide surface functionalization of magnetic beads.

Technical Service

Excellent quality and incomparable price are EPRUI’s trump card over other competitors.
Dr. Yangchengli, who is the CTO and co-founder of EPRUI, graduated as one of top5 PhD students from Institute of Process Engineering in 2005, Chinese Academy of Science, which is the top academic institute in China and once was employed as professor in Peking University teaching chromatographic analysis. He achieved his Post Doctor degree in Georgetown University, which is the Ivy Plus University in the USA.
Leading by Dr. Yang, a group of world class scientists in chromatography industry are able to provide the most effective solutions to your problems during chromatographic analysis and separation.

1. Systematic solutions for separation and purification of natural and biological products

EPRUI Biotech Co. Limited has a complete set of high performance liquid chromatographic packings, including positive phase, reverse phase, ion exchange, size exclusion, hydrophobic interaction and affinity chromatography packing. The matrix are composed of silica gel, crosslinked polystyrene and poly methyl acrylate, which are performance complementary.  EPRUI also gather rich experience in chromatographic separation due to research and exploration in chromatography industry for so many years. Equipped with the most advanced HPLC instrument, EPRUI can help our customers develop an overall solution for separation and purification of natural and biological products in a fast and economical way.

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Technical Service

Ultraviolet Spectrophotometer

Protein Purification System

FTIR Spectrometer

Research Center

EPRUI Biotech Co. Ltd. owns 1000m2 research lab which equips the most advanced analytical instrument and inspection equipment including several high performance liquid chromatography / HPLC made by Waters and Shimadzu, AKTA purifier by GE, FTIR ultraviolet spectrometer, ultraviolet spectrophotometer, high speed centrifuge and so on.

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