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							waters Symmetry制備柱
          采用反相技術(shù)進行分離，組成復(fù)雜的待分離粗品經(jīng)常需要用強溶劑如DMSO進行溶解，由于粗品在流動相中的溶解度低，加上大體積純有機溶劑進樣對制備柱產(chǎn)生的壓力沖擊，是導(dǎo)致制備柱過早失效和柱床塌陷的主要因素。OBD制備柱具有*的柱床穩(wěn)定性，根本不會塌陷，而且柱與柱間性能**，使用壽命大大延長，從而降低了使用成本。

					
          
					
          waters Symmetry制備柱
          采用反相技術(shù)進行分離，組成復(fù)雜的待分離粗品經(jīng)常需要用強溶劑如DMSO進行溶解，由于粗品在流動相中的溶解度低，加上大體積純有機溶劑進樣對制備柱產(chǎn)生的壓力沖擊，是導(dǎo)致制備柱過早失效和柱床塌陷的主要因素。OBD制備柱具有的柱床穩(wěn)定性，根本不會塌陷，而且柱與柱間性能**，使用壽命大大延長，從而降低了使用成本。
          Symmetry半制備柱與制備柱
          裝填技術(shù)與柱硬件對性能的影響
          實驗室規(guī)模的HP LC分離純化對色譜工作者提出了諸多挑戰(zhàn)，其中一個zui大的挑戰(zhàn)是制備色譜柱本身。由于柱與柱之間在性能和使用壽命上的不*性，常常導(dǎo)致樣品損失、重復(fù)純化操作以及從小體積柱到大體積柱的放大能力差。沃特世科學(xué)家意識到這個問題的存在，歷經(jīng)三年，研究了裝填工藝過程中的所有因素以及柱設(shè)計本身。在此基礎(chǔ)上，沃特世公司于2003年推出了*技術(shù)OBDTM(Optimum Bed Density，*柱床密度)應(yīng)用于沃特世制備柱產(chǎn)品。(*UK號 # GB2408469)。
          問題的根本原因就是在于，制備柱的柱床裝填必須足夠致密，才能在使用過程中能夠承受流動相壓力而仍保持穩(wěn)定的柱床狀態(tài)。傳統(tǒng)的勻漿裝填方法，用于分析柱規(guī)格時能夠產(chǎn)生必需的柱床密度；但是當(dāng)用于制備柱并使用較小粒徑填充制備柱時，隨著柱內(nèi)徑與長度的增加，就越來越難以達(dá)到柱長期使用仍能保持穩(wěn)定耐受時所必需的柱床密度。柱床密度的優(yōu)化，取決于色譜填料的特定性質(zhì)與所采用的柱設(shè)計。
          waters Symmetry制備柱可直接放大——準(zhǔn)確可靠地表現(xiàn)分析柱的分離效果
          純化工作者大都遇到這樣的情況；即使使用和分析柱*相同的填料顆粒，色譜分離往往也不能“直接放大”，總是會出現(xiàn)分離度降低或上樣量下降的問題。
          OBD制備柱的柱床密度與分析柱相當(dāng)，具有優(yōu)異的穩(wěn)定性、重現(xiàn)性和柱效，能夠保證分離的直接放大，并避免在制備分離時重新開發(fā)方法。
          更長和可預(yù)測的制備柱壽命
          采用反相技術(shù)進行分離，組成復(fù)雜的待分離粗品經(jīng)常需要用強溶劑如DMSO進行溶解，由于粗品在流動相中的溶解度低，加上大體積純有機溶劑進樣對制備柱產(chǎn)生的壓力沖擊，是導(dǎo)致制備柱過早失效和柱床塌陷的主要因素。
          OBD制備柱具有的柱床穩(wěn)定性，根本不會塌陷，而且柱與柱間性能**，使用壽命大大延長，從而降低了使用成本。
          訂貨信息：
           
          186005562Waters色譜柱XSelect CSH Phenyl-Hexyl Method Validation Kit, 130Å, 3.5 µm, 3 mm X 150 mm, 3/pkg 
          186005448Waters色譜柱XSelect CSH Phenyl-Hexyl OBD Prep Column, 130Å, 5 µm, 19 mm X 150 mm, 1/pkg 
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          186006140Waters色譜柱XSelect HSS C18 XP Column, 100Å, 2.5 µm, 3 mm X 30 mm, 1/pkg 
          186007851Waters色譜柱XSelect HSS C18 VanGuard Cartridge, 100Å, 3.5 µm, 2.1 mm X 5 mm, 3/pkg 
          186007854Waters色譜柱XSelect HSS C18 VanGuard Cartridge, 100Å, 5 µm, 2.1 mm X 5 mm, 3/pkg 
          186004776Waters色譜柱XSelect HSS C18 Prep Guard Cartridge, 100Å, 5 µm, 10 mm X 10 mm, 1/pkg 
          186007853Waters色譜柱XSelect HSS C18 VanGuard Cartridge, 100Å, 3.5 µm, 3.9 mm X 5 mm, 3/pkg 
          186006143Waters色譜柱XSelect HSS C18 XP Column, 100Å, 2.5 µm, 3 mm X 100 mm, 1/pkg 
          176002619Waters色譜柱XSelect HSS C18 XP Column, 100Å, 2.5 µm, 2.1 mm X 50 mm, 3/pkg 
          176002618Waters色譜柱XSelect HSS C18 XP Column, 100Å, 2.5 µm, 2.1 mm X 30 mm, 3/pkg 
          186006416Waters色譜柱XSelect HSS C18 Method Validation Kit, 100Å, 5 µm, 4.6 mm, X 250 mm, , 3/pkg 
          186006414Waters色譜柱XSelect HSS C18 Method Validation Kit, 100Å, 5 µm, 4.6 mm X 100 mm, 3/pkg 
          186006415Waters色譜柱XSelect HSS C18 Method Validation Kit, 100Å, 5 µm, 4.6 mm X 150 mm, 3/pkg 
          186007856Waters色譜柱XSelect HSS C18 VanGuard Cartridge, 100Å, 5 µm, 3.9 mm X 5 mm, 3/pkg 
          186006422Waters色譜柱XSelect HSS C18 SB Column, 100Å, 3.5 µm, 2.1 mm X 50 mm, 1/pkg
          186006421Waters色譜柱XSelect HSS C18 SB Column, 100Å, 3.5 µm, 2.1 mm X 30 mm, 1/pkg
          186006424Waters色譜柱XSelect HSS C18 SB Column, 100Å, 3.5 µm, 2.1 mm X 100 mm, 1/pkg 
          186006423Waters色譜柱XSelect HSS C18 SB Column, 100Å, 3.5 µm, 2.1 mm X 75 mm, 1/pkg
          186006738Waters色譜柱XSelect HSS C18 XP Column, 100Å, 2.5 µm, 4.6 mm X 150 mm, 1/pkg 
          186005643Waters色譜柱XSelect HSS C18 SB Column, 100Å, 3.5 µm, 3 mm X 75 mm, 1/pkg 
          186006425Waters色譜柱XSelect HSS C18 SB Column, 100Å, 3.5 µm, 2.1 mm X 150 mm, 1/pkg 
          176002623Waters色譜柱XSelect HSS C18 XP Column, 100Å, 2.5 µm, 3 mm X 50 mm, 3/pkg 
          176002624Waters色譜柱XSelect HSS C18 XP Column, 100Å, 2.5 µm, 3 mm X 75 mm, 3/pkg 
          186006145Waters色譜柱XSelect HSS C18 XP Column, 100Å, 2.5 µm, 4.6 mm X 50 mm, 1/pkg
          186006144Waters色譜柱XSelect HSS C18 XP Column, 100Å, 2.5 µm, 4.6 mm X 30 mm, 1/pkg
          186006142Waters色譜柱XSelect HSS C18 XP Column, 100Å, 2.5 µm, 3 mm X 75 mm, 1/pkg 
          186006147Waters色譜柱XSelect HSS C18 XP Column, 100Å, 2.5 µm, 4.6 mm X 100 mm, 1/pkg 
          
                                                                				
          

			
          
		
          
	
          
	
          
	

	 		 
	
          
		
          
			
          
				
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