OnGuard II 樣品前處理小柱057083
The OnGuard? II 柱設計用來消除基質(zhì)的干擾，如酚醛塑料，金屬離子，陽離子，陰離子，或在離子色譜應用中存在的疏水性物質(zhì)。Dionex OnGuard II 樣品前處理系列小柱產(chǎn)品包括七種功能類型，兩種大小規(guī)格（1.0 cc和2.5 cc）。這些產(chǎn)品適用于對樣品進行分析物的固相萃取和樣品的基體去除。所謂的樣品基體去除是指利用樣品中基體組分與樣品前處理小柱中的固定相之間的*結(jié)合使基體中的干擾組分保留在樣品前處理小柱上，而被分析物則不被保留直接通過樣品前處理小柱，從而進行后續(xù)的分析測定，這樣就可消除樣品基體中共存組分對測定的干擾。對于分析物的直接固相萃取方法則是指將分析樣品的溶液通過樣品前處理小柱時，分析物由于*的結(jié)合作用被直接保留在樣品前處理小柱上，而樣品中的基體組分則不被保留，從而通過樣品前處理小柱，隨后再使用合適的洗脫劑將萃取于樣品前處理小柱上的被分析物洗脫下來進行后續(xù)的分析測定，這種方法也可達到分析物富集和樣品基體去除的作用。

OnGuard II 樣品前處理小柱057083由于新的設計理念的采用，Dionex OnGuard II樣品前處理小柱系列產(chǎn)品既具有出色的分析性能，有極大的方便了分析者的使用。同時2.5 cc規(guī)格的樣品前處理小柱具有較高的柱容量，適合于處理離子強度高的樣品，這種規(guī)格的小柱也有利于降低使用成本。另外這種柱型設計也有利于實現(xiàn)樣品前處理過程的自動化。

Remove Matrix Interferences for Better rformance 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.

Solve Tough Applications Problems

Facilitate better separations
Increase lifetimes of analytical columns
Solve major matrix problems
Achieve reproducible trace-level determinations in concentrated matrices

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 rformance in matrix removal or concentration applications.

Guaranteed rformance

All OnGuard II products are shipd with a Certificate of Analysis verifying product capacity, rformance, 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

OnGuard II A
OnGuard II Ag
OnGuard II Ba
OnGuard II H
OnGuard II Na
OnGuard II M
OnGuard II P
OnGuard II RP
OnGuard II Ag/H
OnGuard II II Ba/Ag/H

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 dending 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.

訂貨信息:

OnGuard II A
OnGuard II A Cartridges, 1 cc, Pkg of 48 057091
OnGuard II A Cartridges, 2.5 cc, Pkg of 48 057092
OnGuard II Ag
OnGuard II Ag Cartridges, 1 cc, Pkg of 48 057089
OnGuard II Ag Cartridges, 2.5 cc, Pkg of 48 057090

OnGuard II Ag/H

OnGuard II Ag-H Cartridge, 2.5 cc, Pkg of 48 057410
OnGuard II Ba
OnGuard II Ba Cartridges, 1 cc, Pkg of 48 057093
OnGuard II Ba Cartridges, 2.5 cc, Pkg of 48 057094
OnGuard II Ba/Ag/H
OnGuard II Ba/Ag/H Cartridges, 2.5 cc, Pkg of 48 063955
OnGuard II H
OnGuard II H Cartridges, 1 cc, Pkg of 48 057085
OnGuard II H Cartridges, 2.5 cc, Pkg of 48 057086
OnGuard II M
OnGuard II M Cartridges, 1 cc, Pkg of 48 057137
OnGuard II M Cartridges, 2.5 cc, Pkg of 48 057095
OnGuard II Na
OnGuard II Na Cartridges, 1 cc, Pkg of 48 062948
OnGuard II Na Cartridges, 2.5 cc, Pkg of 48 062962
OnGuard II P
OnGuard II P Cartridges, 1 cc, Pkg of 48 057087
OnGuard II RP
OnGuard II RP Cartridges, 1 cc, Pkg of 48 057083
OnGuard II RP Cartridges, 2.5 cc, Pkg of 48 057084
OnGuard Accessories
OnGuard Sample Prep Workstation 039599
OnGuard Needle, 18 Gauge, 1.25/Luer 039996
OnGuard Valve, Stopcock Luer 040896

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