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Dionex OnGuard II 固相萃取小柱

更新時間：2019-11-20

簡要描述：

Dionex OnGuard II 固相萃取小柱
設計用來消除基質的干擾，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。

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Dionex OnGuard II 固相萃取小柱

The OnGuard II 柱設計用來消除基質的干擾，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。

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。
由于新的設計理念的采用，Dionex OnGuard II固相萃取小柱系列產(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 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

  • 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 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)

  • 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 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
CartridgeFunctionalityCapacitySolventspH   StabilityMode of Use
  (meq/   cartridge)  
  1-cc2.5-cc  
OnGuard AAnion-exchange   Bicarbonate form0.71.750–100%   HPLC solvents0–14Removal   of anions; pH adjustment of acidic samples
OnGuard AgCation-exchange   Silver form2.0–2.25.0–5.50–100%   HPLC solvents0–14Removal   of chloride, bromide iodide by precipitation
OnGuard BaCation-exchange   Barium form2.0–2.25.0–5.50–100%   HPLC solvents0–14Removal   of sulfate by precipitation
OnGuard HCation-exchange   Hydronium form2.0–2.25.0–5.50–100%   HPLC solvents0–14Removal   of alkaline earth and transition metals; pH adjustment of basic samples
OnGuard NaCation-exchange   sodium form2.0–2.25.0–5.50–100%   HPLC solvents0–14Removal   of alkaline earth and transition metals
OnGuard MIminodiacetate   Ammonium form0.410–100%   HPLC solvents0–14*Concentration   of transition metals by chelation (2.5-cc format); removal of transition   metals (1-cc format)
OnGuard PPolyvinylpyrrolidone6Format   not available0–100%   HPLC solvents1–10Removal   of phenols, azo dyes, humic acids by complexation
OnGuard RPPolydivinylbenzene0.3   g resin0.75   g resin0–100%   HPLC solvents0–14Removal   of surfactants, high MW carboxylic acids, aromatic dyes by adsorption
OnGuard Ag/HCation-exchange   silver form; cation-exchange hydronium formFormat   not available4.6   (Ag)0.8 (H)0–100%   HPLC solvents0–14Removal   of chloride, bromide, iodide by precipitation; removal of alkaline earth and   transition metals; pH adjustment of basic samples
OnGuard Ba/Ag/HCation-exchange   silver form; cation-exchange barium form; cation-exchange hydronium formFormat   not available2.2–2.6   (Ba) 2.2–2.6 (Ag) 0.8 (H)0–100%   HPLC solvents0–14Removal   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.

 

Dionex OnGuard II 固相萃取小柱

訂貨信息：

DescriptionPart Number
Dionex OnGuard Cartridges (1-cc) 
Dionex OnGuard II A, 1c.c, Pkg   of 12088355
Dionex OnGuard   II M, 1c.c, Pkg of 12088356
Dionex OnGuard   II Na, 1cc, Pkg of 12088357
Dionex OnGuard   II P, 1cc, Pkg of 12088358
Dionex OnGuard   II RP, 1-cc, pkg of 12082760
Dionex OnGuard   II H, 1-cc, pkg of 12082761
Dionex OnGuard   II Ag, 1-cc, pkg of 12082762
Dionex OnGuard   II Ba, 1-cc, pkg of 12082763
Dionex OnGuard   II A, 1-cc, pkg of 48057091
Dionex OnGuard   II Ag, 1-cc, pkg of 48057089
Dionex OnGuard   II Ba, 1-cc, pkg of 48057093
Dionex OnGuard   II H, 1-cc, pkg of 48057085
Dionex OnGuard   II Na, 1-cc, pkg of 48062948
Dionex OnGuard   II M, 1-cc, pkg of 48057137
Dionex OnGuard   II P, 1-cc, pkg of 48057087
Dionex OnGuard   II RP, 1-cc, pkg of 48057083
  
Dionex OnGuard Cartridges (2.5-cc) 
Dionex OnGuard II, Ba/Ag/H,   2.5-cc, pkg of 12082764
Dionex OnGuard   II Ag/H, 2.55-cc, pkg of 12082756
Dionex OnGuard   II A, 2.5-cc, pkg of 48057092
Dionex OnGuard   II Ag, 2.5-cc, pkg of 48057090
Dionex OnGuard   II Ba, 2.5-cc, pkg of 48057094
Dionex OnGuard   II H, 2.5-cc, pkg of 48057086
Dionex OnGuard   II Na, 2.5-cc, pkg of 48062962
Dionex OnGuard   II M, 2.5-cc, pkg of 48057095
Dionex OnGuard   II RP, 2.5-cc, pkg of 48057084
Dionex OnGuard   II Ag/H, 2.5-cc, pkg of 48057410
Dionex OnGuard   II Ba/Ag/H, 2.55-cc, pkg of 48063955
Dionex OnGuard   II Cartridges with Multiple Resin LayersInquire
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 BarrelsInquire
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 ResinsInquire
All Dionex OnGuard resins are available   as custom orders in bulk in 50 g quantities.
Dionex OnGuard Sample Prep Station
Dionex OnGuard Sample Prep   Station039599
Dionex OnGuard   Needle, 18-gauge, 1.25 Luer039996
Dionex OnGuard   Sample Reservoir, 5-cc, pkg of 250041233
Dionex OnGuard   Valve, Luer stopcock040896

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