欧美97视频,三级精品在线观看,91丨porny丨国产入口

午夜免费福利视频-奇米久久-视频在线看-天堂综合网-男女啪啪免费-欧美色交-日本人性爱视频-熟女视频一区-欧美女优在线观看-99热精品在线播放-一区二区免费在线-狠狠操电影-伊人影视网-日韩欧美有码-骑骑夜电影在线观看免费播放-大伊人久久-天堂网av2018-久久一级免费视频-五月天av网站-欧美你懂得-潘金莲黄色一级片-91porny丨首页入口在线-日韩一区网站-成人黄色片免费-青草视频在线观看视频-亚洲一级伦理-国产视频2021-免费在线观看毛片视频-国产二级片在线观看-欧美色精品天天在线观看视频

Dow Dowex fine spherical ion exchange resin

Dow Dowex fine spherical ion exchange resin Dowex fine resin adopts the selective controlled suspension polymerization technology used in Dow production standard 16-50 mesh industrial resin. The resin produced by this technology is more complete and uniform, with the highest level of selectivity, consistency and reliability. Therefore, it can provide excellent dynamic performance and filling performance in chromatographic separation, without problems of abrasive resin or granular resin. By controlling the suspension polymerization manufacturing process, the particle size of Dowex fine resin can be strictly controlled, so as to avoid dust easily generated due to ultrafine particles when processing dry resin, and to avoid the physical loss and resin loss caused by the fine particles blocking the sieve plate or filter and prolonging the loading time of batch processing when used as chromatography medium or filter aid.

Online

Product features The application case The order information Data download

Product characteristics

Dowex series of ion exchange chromatography separation resins are divided into two categories: strong acid cation exchange resin and strong basic anion exchange resin. Each category is divided into three categories according to the different degree of crosslinking (DVB%). Each category is represented by "× 2", "× 4" and "× 8". On this basis, three particle size ranges are provided, namely 150-300 μ m (50-100 mesh) and 75-150 μ m (100 mesh) -200 mesh) and 35-75 μ m (200-400 mesh), a total of 18 resin brands. Obviously, the resin with different crosslinking degrees has different water content, volume exchange capacity and material diffusion resistance. Such a wide range of products enriches the trial selection of customers, and suitable chromatographic separation resin can be selected for specific application.

The framework materials of Dowex series ion exchange chromatographic separation resins are all styrene divinylbenzene, which are prepared on a large scale by special suspension polymerization process and have good chemical and physical stability. Easy packed column, small diffusion resistance of target components, stable product quality. Therefore, Dowex series ion exchange chromatography separation resin can not only meet the small-scale test process development of laboratory food, medicine and other fine chemical products, but also make the process amplification easier.

Model	Particle size (mesh)	Ionic type	water content（%）	Total switching capacity（meq/ml）
DOWEX 50W×2	50-100	H+	74-82	0.6
DOWEX 50W×2	100-200	H+	74-82	0.6
DOWEX 50W×2	200-400	H+	74-82	0.6
DOWEX 50W×4	50-100	H+	64-72	1.1
DOWEX 50W×4	100-200	H+	64-72	1.1
DOWEX 50W×4	200-400	H+	64-72	1.1
DOWEX 50W×8	50-100	H+	50-56	1.7
DOWEX 50W×8	100-200	H+	50-58	1.7
DOWEX 50W×8	200-400	H+	50-58	1.7
DOWEX 1×2	50-100	Cl-	65-75	0.7
DOWEX 1×2	100-200	Cl-	70-80	0.6
DOWEX 1×2	200-400	Cl-	70-80	0.6
DOWEX 1×4	50-100	Cl-	50 min.	1.0
DOWEX 1×4	100-200	Cl-	55-63	1.0
DOWEX 1×4	200-400	Cl-	55-63	1.0
DOWEX 1×8	50-100	Cl-	43-48	1.2
DOWEX 1×8	100-200	Cl-	39-45	1.2
DOWEX 1×8	200-400	Cl-	39-45	1.2

Recommended spare parts

Related to recommend

Message