日韩人妻无码精品无码中文字幕,臭小子我是你岳...你不能视频 ,日本xxxx色视频在线观看,亚洲永久无码7777kkk

歡迎來到上海宸喬生物科技有限公司網(wǎng)站!
咨詢熱線

18801803238

當(dāng)前位置:首頁   >  產(chǎn)品中心  >  Ultrasep ES液相色譜柱  >  Chiralic Analysis(手性分析)  >  Chiralic Analysis

Chiralic Analysis

簡要描述:Special columns are a central concern in our company. With an appropriate column you can solve nearly all separation tasks, not laboriously by high plate numbers, but simply by tailor made selectiviti

  • 產(chǎn)品型號:
  • 廠商性質(zhì):生產(chǎn)廠家
  • 更新時間:2024-08-07
  • 訪  問  量:1549

詳細(xì)介紹

Other Special Columns

Special columns are a central concern in our company. With an appropriate column you can solve nearly all separation tasks, not laboriously by high plate numbers, but simply by tailor made selectivities. l us your problem!

By the way, the following packings are only available from SEPSERV. They were mostly developed due to orders of customers. For reasons of discretion it is not possible in every case to name the separation problems worked on.

 ·      UltraSep ES POLYOL, optically active as
a) UltraSep ES AMINOPOLYOL H
    (Aminodesoxyhexitol) 

 

 

b) UltraSep ES AMINOPOLYOL G
   
 (Aminodesoxy-d-glucose)

 
·   UltraSep ES AMINOTETRAOL 
Alcoholic hydroxyls and amino groups on the surface of this packing are responsible for a blocking of residual silanols. This means, that polar compounds can be excellently separated by normal phase chromatography. Example: Stereoisomeric organic N-oxides. AMINOTETRAOL is a very versatile phase. In the pharmaceutical industry it is advantageously used also with aqueous and aqueous-organic eluents. One can use the phase to separate sugars and more. Furthermore, the packing works as a weak ion exchanger and separates with weak eluents, e. g., organic carbon acids at pH 3.
·    UltraSep ES DTA (= Diethylenetriamine)
This packing is designated for special applications with amino packings. To this group belongs also UltraSep ES TTA

   – CH2 – NH – CH2 – CH2 – NH – CH2 – CH2 – NH2

 

·   UltraSep ES Tetraminool (TTA)
    
 (= Triethylenetetramine)
This packing has in comparison with DTA a doubled spacer chain and three ethylene residues connected by nitrogen atoms. Beside the primary amino group at the end of the chain there exists an alcoholic hydroxyl group at the spacer.
   – CH2 – NH – (CH2 – CH2 – NH)– CH2 – CH2 – NH2
 
 
·   UltraSep ES RP8F (Fluorooctylsilica)
This packing is a fluorooctylsilica, where the H-atoms of each C-atom are substituted by 17 fluorine atoms. This packing is an alternative RP phase with relatively rigid strong hydrophobic chains for special applications.
   – (CF2)7 – CF3 
·   UltraSep ES PEO (Polyethyleneglycolsilica)
UltraSep ES PEO is a packing on the basis of polyethyleneoxide chains. Within the chain C2 segments alternate with oxygen atoms. In total there are 26 atoms within the chain, 18 of them are carbon atoms as it is the case in standard reversed phases. Their properties are levelled by the oxygen atoms and combined with interactions due to hydrogen bridges (OH....O; NH....O). Therefore the  PEO packing can be used both for reversed phase chromatography and for normal phase chromatography (see application PEO1 and PEO2, respectively). With adequate compounds it exhibits specific selectivity effects as well as shorter retention times in comparison to RP18 materials.
   – (CH– CH2 – O)6-9 – CH2 – CH2 – OCH

 

 

 

Application PEO1

Application PEO2

 
·   UltraSep ES PFP 
UltraSep ES PFP is a pentafluorophenylalkylsilica of the RP8 reversed phase type with outstanding properties.  On average it yields the retention times of the RP18 packing type with the following characteristics:
Compounds which are not separated enough by normal RP18 phases, potentially can be resolved sufficiently using the PFP packing (purity screening).
PFP is very attractive for pharmaceutically relevant substances, especially for bases, which  in principle show a small tailing (application PFP1 and PFP2). Base pairs which are not separated by normal RP packings, can be resolved (applicationPFP3).
PFP packings behave significantly different in comparison to normal RP packings. For instance in the test mixture of toluene, propyl benzene and pentyl benzene with rising water content the peaks become slender. At a composition  of the acetonitrile/water mixture of 1/1 125,000 theoretical plates per m are accomplished already with 4 µm material.
PFP phases together with the normal RP phases and RP amid phases or also with PEO phases yield an advantageous "selectivity trio" and "selectivity quartet", respectively.
 

 

 

 

 

Application PFP1

Application PFP2

Application PFP3

 
·   UltraSep ES C30 (RP-packing)
With long C30 chains normal material (pore diameter of 120 Å) as well as material with large pores (pore diameter of 300 Å = D300) are offered.
   – (CH2)29 – CH3

Application

 
·    UltraSep ES ADC  (= Aminodicarboxy)
As active group aminodiacetic acid was bound over a spacer with 6 C atoms.
 
·       UltraSep ES TC (= Triolcarboxy)
In this packing a carboxylic group was combined with a hydroxymethyl cluster having the basic ligand structure shown in the formula. 
 
·    UltraSep ES C12 TA (= Triamino)
This packing is strongly polar and possesses branched aliphatic chains containing two terminal primary amino groups and one secondary amino group.
  
·   UltraSep ES C10 w-COOH
This is a medium polar packing with an unbranched aliphatic carbon chain and two carboxylic groups, one is terminal . It shows typical RP behaviour.
  
·   UltraSep ES AMID RP18 500
This packing is a lowly charged methyloctadecylsilica gel with a specific selectivity.
     

Shield - Carrier (Embedded Groups) — RP packings with polar selectivity

[see GIT 46 (2002), number 1 . Please ask for a reprint.]

suitable

for purely aqueous media ("Aq") without phase collaps

for the separation of highly polar compounds

·   UltraSep ES AMID RP18A
3-(Octadecanoylamino)propylslilyl-Silica. The packing carries an amide group between spacer and RP chain (so called Embedded Group). Spec. area 280 m²/g.

Application

 
·   UltraSep ES AMID RP18AM
The packing possesses additionally a methyl group at the silyl residue. Spec. area 420 m²/g.

 

 
·   UltraSep ES AMID H RP18PA
3-(Heptadecylureido)-propylslilyl-Silica. The packing carries a urea group instead of the amide group.

Application1

Application2

 

·   UltraSep ES CHAIR
UltraSep ES CHAIR is a special phase obtained by chemical bonding of a sufficiently long non polar chain to the silica. The chain bears one or two polar substituents at the first third or at the middle part.

The groups show a pronounced interaction with silanols. Therefore, depending on the chromatographic conditions for a unique chain folding, a chair like configuration can be expected ( figure).

It is well known, that normal phases with polar groups show RP-behaviour too. With chair phases, that dual behaviour was intentional, so to speak, typified. In this way we can synthesize tailor-made selectivities, changing the length of the non polar chain R or the nature and/or number (1 or 2) of the polar groups.

UltraSep ES CHAIR  is often used, e. g. in the pharmaceutical industry and in biochemical institutions. Example: Cephalosporines.

  

UltraSep ES CHAIR structure (on principle)

P  =   Polar substituent (interaction with silanoles)

R  =  Alkyl chain with 2 – 12 carbon atoms

Application

 
·   UltraSep ES UREIDO
Ureidopropylsilyl-silica. Normal phase with a urea group at the end of the propyl spacer
  

 

 

COLUMNS and  PRICES  ()
 Column size (mm)
UltraSep ES250 x 4
200 x 4
250 x 3
200 x 3
250 x 2
200 x 2
150 x 4
125 x 4
150 x 3
125 x 3
150 x 2
125 x 2
100 x 4
60 x 4
100 x 3
60 x 3
100 x 2
60 x 2

AMINOPOLYOL H

265.00265.00270.00255.00255.00260.00245.00245.00250.00

AMINOPOLYOL G

265.00265.00270.00255.00255.00260.00245.00245.00250.00

AMINOTETRAOL

250.00250.00255.00240.00240.00245.00225.00225.00235.00

DTA

290.00290.00290.00265.00265.00270.00255.00255.00260.00

Tetraminool (TTA)

290.00290.00290.00265.00265.00270.00255.00255.00260.00

RP8F

330.00315.00315.00290.00290.00295.00280.00280.00285.00

PEO

510.00

480.00

480.00

430.00

430.00

430.00410.00

400.00

400.00

PFP

510.00480.00480.00430.00430.00430.00410.00400.00400.00

C30 or C30DM

395.00395.00395.00365.00365.00365.00355.00355.00355.00

D300 C30

480.00480.00480.00445.00445.00445.00435.00435.00435.00

ADC

265.00265.00270.00255.00255.00260.00245.00245.00250.00

TC

265.00265.00270.00255.00255.00260.00245.00245.00250.00

C12 TA

250.00250.00255.00240.00240.00245.00225.00225.00235.00

C10 w-COOH

290.00290.00290.00265.00265.00270.00255.00255.00260.00

RP18 500

270.00265.00265.00240.00235.00235.00210.00210.00215.00

AMID RP18A

340.00335.00335.00305.00300.00300.00285.00285.00290.00

AMID RP18AM

340.00335.00335.00305.00300.00300.00285.00285.00290.00

AMID H RP18PA

270.00265.00265.00240.00235.00235.00210.00210.00215.00

AMID H RP18P

270.00265.00265.00240.00235.00235.00210.00210.00215.00

CHAIR

240.00240.00245.00235.00225.00235.00215.00215.00220.00

UREIDO

210.00210.00210.00210.00200.00200.00200.00200.00200.00

Phenylhexyl

390.00380.00395.00370.00360.00375.00335.00325.00340.00

 

Size (mm)

  
10 x 410 x 310 x 2
Precolumn cartridges
(Price per pack = 5 pieces)
170.00170.00170.00

產(chǎn)品咨詢

留言框

  • 產(chǎn)品:

  • 您的單位:

  • 您的姓名:

  • 聯(lián)系電話:

  • 常用郵箱:

  • 省份:

  • 詳細(xì)地址:

  • 補(bǔ)充說明:

  • 驗證碼:

    請輸入計算結(jié)果(填寫阿拉伯?dāng)?shù)字),如:三加四=7

聯(lián)系我們

上海宸喬生物科技有限公司 公司地址:上海市阿克蘇路1187號516室   技術(shù)支持:化工儀器網(wǎng)
  • 聯(lián)系人:王經(jīng)理
  • QQ:3004300903
  • 公司傳真:021-59100893-802
  • 郵箱:sales@keyanwang.com.cn

掃一掃 更多精彩

微信公眾號

網(wǎng)站二維碼

欧美大荫蒂毛茸茸视频| jzzijzzij亚洲乱熟无码 | 国产小受呻吟GV视频在线观看| 久久久久亚洲av片无码v| 亚洲av永久无码精品网站| 极品少妇被猛得白浆直流草莓视频 | 搡老熟女国产| 动漫3d成人h无码国漫| 国产综合久久久久久精品| 99草草国产熟女视频在线| 国产精品亚洲精品日韩已方| 4444亚洲人成无码网在线观看| 免费国产黄网站在线观看视频| 国产精品v欧美精品v日韩精品| 又粗又黄又爽视频免费看 | 久久久精品人妻一区亚美研究所| 久久人人爽人人爽人人片Ⅴ| aaa级久久久精品无码片| 中文字幕av伊人av无码av| 99精品一区二区三区无码吞精 | 女人下边被添全过视频| 末成年女AV片一区二区丫| 亚洲精品久久久久久| 日本爆乳无码一区二区漫画| 无码人妻久久一区二区三区蜜桃| 日本xxxx色视频在线观看| 欧美激情综合五月色丁香 | 色婷婷综合中文久久一本| 亚洲A无码综合A国产AV中文| 99久久人妻精品免费一区| 色综合视频一区中文字幕| 国产丰满麻豆videossexhd| 国产无遮挡又黄又爽在线视频| 亚洲精品深夜av无码一区二区 | 亚洲A无码综合A国产AV中文| 亚洲 另类 日韩 制服 无码| 亚洲加勒比久久88色综合| 亚洲中文字幕无码永久在线| 国产女人18毛片水真多18精品 | 久久99精品久久久久久| 国产精品成人无码视频|