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戴安 OnGuard II 固相萃取小柱 其他专用小柱

 
品牌: 戴安
单价: 面议
起订:
供货总量:
发货期限: 自买家付款之日起 天内发货
所在地: 进口
有效期至: 2022-09-01
最后更新: 2021-10-29 08:52
浏览次数: 103
 
公司基本资料信息
详细说明

onGuard II 固相萃取小柱

The onGuard II 柱设计主要用来消除基质的干扰,如酚醛塑料,金属离子,阳离子,阴离子,或者在离子色谱应用中存在的疏水性物质。

Dionex onGuard II 样品前处理系列小柱产品拥有七种功能类型,拥有1.0 cc和2.5 cc两种大小规格。这些产品适合用于对样品进行分析物的固相萃取和样品的基体去除。所谓的样品基体去除是指利用样品中基体组分与样品前处理小柱中的固定相之间的特有结合使基体中的干扰组分保留在样品前处理小柱上,而被分析物则不被保留直接通过样品前处理小柱,从而进行后续的分析测定,这样就可消除样品基体中共存组分对测定的干扰。对于分析物的直接固相萃取方法则是指将分析样品的溶液通过样品前处理小柱时,分析物由于特有的结合作用被直接保留在样品前处理小柱上,而样品中的基体组分则不被保留,从而通过样品前处理小柱,然后再使用合适的洗脱剂将萃取于样品前处理小柱上的被分析物洗脱下来进行后续的分析测定,这种方法也可达到分析物富集和样品基体去除的作用。

由于新的设计理念的采用,Dionex onGuard II固相萃取小柱系列产品既具有出色的分析性能,有极大的方便了分析者的使用。同时2.5 cc规格的样品前处理小柱具有较高的柱容量,适合于处理离子强度高的样品,这种规格的小柱也有利于降低使用成本。另外这种柱型设计也有利于实现样品前处理过程的自动化。

Remove Matrix Interferences for Better Performance in Many IC Applications

The onGuard II Cartridges remove matrix interferences such as phenolics, metals, cations, anions, or hydrophobic substances encountered in many ion chromatography applications. These cartridges have wide pH stability and allow low level ion analysis. Cartridges are available in 1 cc and 2.5 cc high-capacity formats. Six select chemistries are now available in trial size packs of 12 cartridges (listed below).

Solve Tough Applications Problems



Optimized Design and Manufacture

The onGuard II hardware is designed with Luer inlets for easy and secure connections. The cartridge design eliminates leaks and channeling. The unique sample distribution frit maximizes complete resin bed usage. The cartridge hardware is optimized for the best possible performance in matrix removal or concentration applications.

Guaranteed Performance

All onGuard II products are shipped with a Certificate of Analysis verifying product capacity, performance, and cleanliness.

Convenient and Easy to Use

Samples are easy to process. Samples can be passed through the cleanup cartridge directly into the LC injector valve loop using a Luer-style syringe. Alternatively, samples can be processed in parallel using the onGuard Sample Prep Station.

Versatile Selection of Resins (*Available in 12 cartridge packs)



The onGuard II family of sample pretreatment cartridges is available in a wide range of packings and in two sizes(1-cc and 2.5-cc) to fit your sample pretreatment needs. In addition, resins are available in the Auto OnGuard? syringe barrel format for robotic processing as custom order products. The Summary tab contains a table summarizing the onGuard products and their typical applications.

Cartridges can be used singly or in series depending on the matrix interferences to be removed. The onGuard Ba, onGuard Ag, and onGuard H cartridges can be used in series to remove sulfate, chloride, and carbonate from a water sample prior to trace-level determination of bromate.

onGUARD   II CARTRIDGE CHEMISTRIES AND TYPICAL APPLICATIONS
Cartridge Functionality Capacity Solvents pH   Stability Mode of Use


(meq/   cartridge)



1-cc 2.5-cc

onGuard A Anion-exchange   Bicarbonate form 0.7 1.75 0–100%   HPLC solvents 0–14 Removal   of anions; pH adjustment of acidic samples
onGuard Ag Cation-exchange   Silver form 2.0–2.2 5.0–5.5 0–100%   HPLC solvents 0–14 Removal   of chloride, bromide iodide by precipitation
onGuard Ba Cation-exchange   Barium form 2.0–2.2 5.0–5.5 0–100%   HPLC solvents 0–14 Removal   of sulfate by precipitation
onGuard H Cation-exchange   Hydronium form 2.0–2.2 5.0–5.5 0–100%   HPLC solvents 0–14 Removal   of alkaline earth and transition metals; pH adjustment of basic samples
onGuard Na Cation-exchange   sodium form 2.0–2.2 5.0–5.5 0–100%   HPLC solvents 0–14 Removal   of alkaline earth and transition metals
onGuard M Iminodiacetate   Ammonium form 0.4 1 0–100%   HPLC solvents 0–14* Concentration   of transition metals by chelation (2.5-cc format); removal of transition   metals (1-cc format)
onGuard P Polyvinylpyrrolidone 6 Format   not available 0–100%   HPLC solvents 1–10 Removal   of phenols, azo dyes, humic acids by complexation
onGuard RP Polydivinylbenzene 0.3   g resin 0.75   g resin 0–100%   HPLC solvents 0–14 Removal   of surfactants, high MW carboxylic acids, aromatic dyes by adsorption
onGuard Ag/H Cation-exchange   silver form; cation-exchange hydronium form Format   not available 4.6   (Ag)0.8 (H) 0–100%   HPLC solvents 0–14 Removal   of chloride, bromide, iodide by precipitation; removal of alkaline earth and   transition metals; pH adjustment of basic samples
onGuard Ba/Ag/H Cation-exchange   silver form; cation-exchange barium form; cation-exchange hydronium form Format   not available 2.2–2.6   (Ba) 2.2–2.6 (Ag) 0.8 (H) 0–100%   HPLC solvents 0–14 Removal   of chloride, bromide, iodide by precipitation; removal of alkaline earth and   transition metals; pH adjustment of basic samples; Removal of sulfate by   precipitation

* Resin shrinks in acid form.


订货信息:

Description Part Number
Dionex onGuard Cartridges (1-cc)
Dionex onGuard II A, 1c.c, Pkg   of 12 088355
Dionex onGuard   II M, 1c.c, Pkg of 12 088356
Dionex onGuard   II Na, 1cc, Pkg of 12 088357
Dionex onGuard   II P, 1cc, Pkg of 12 088358
Dionex onGuard   II RP, 1-cc, pkg of 12 082760
Dionex onGuard   II H, 1-cc, pkg of 12 082761
Dionex onGuard   II Ag, 1-cc, pkg of 12 082762
Dionex onGuard   II Ba, 1-cc, pkg of 12 082763
Dionex onGuard   II A, 1-cc, pkg of 48 057091
Dionex onGuard   II Ag, 1-cc, pkg of 48 057089
Dionex onGuard   II Ba, 1-cc, pkg of 48 057093
Dionex onGuard   II H, 1-cc, pkg of 48 057085
Dionex onGuard   II Na, 1-cc, pkg of 48 062948
Dionex onGuard   II M, 1-cc, pkg of 48 057137
Dionex onGuard   II P, 1-cc, pkg of 48 057087
Dionex onGuard   II RP, 1-cc, pkg of 48 057083


Dionex onGuard Cartridges (2.5-cc)
Dionex onGuard II, Ba/Ag/H,   2.5-cc, pkg of 12 082764
Dionex onGuard   II Ag/H, 2.55-cc, pkg of 12 082756
Dionex onGuard   II A, 2.5-cc, pkg of 48 057092
Dionex onGuard   II Ag, 2.5-cc, pkg of 48 057090
Dionex onGuard   II Ba, 2.5-cc, pkg of 48 057094
Dionex onGuard   II H, 2.5-cc, pkg of 48 057086
Dionex onGuard   II Na, 2.5-cc, pkg of 48 062962
Dionex onGuard   II M, 2.5-cc, pkg of 48 057095
Dionex onGuard   II RP, 2.5-cc, pkg of 48 057084
Dionex onGuard   II Ag/H, 2.5-cc, pkg of 48 057410
Dionex onGuard   II Ba/Ag/H, 2.55-cc, pkg of 48 063955
Dionex onGuard   II Cartridges with Multiple Resin Layers Inquire
All Dionex onGuard resins are available   custom packed with up to
three different resin layers   stacked in the 2.5-cc Dionex onGuard format.
Auto Dionex   onGuard II Barrels Inquire
All Dionex onGuard resins are available   custom packed in 3 mL or
6 mL syringe-style barrels.   These configurations are ideal for robotic processing.
Bulk Dionex onGuard Resins Inquire
All Dionex onGuard resins are available   as custom orders in bulk in 50 g quantities.
Dionex onGuard Sample Prep Station
Dionex onGuard Sample Prep   Station 039599
Dionex onGuard   Needle, 18-gauge, 1.25 Luer 039996
Dionex onGuard   Sample Reservoir, 5-cc, pkg of 250 041233
Dionex onGuard   Valve, Luer stopcock 040896

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