Dionex OnGuard II RP Purification Column

Broken down. OnGuard II RPPurification column

(Item number) 057083）‌It's Thermo Fisher（Thermo Scientific™）A newly launched product‌Offline sample pretreatment purification column‌, specifically designed for ion chromatography（IC）Or high-performance liquid chromatography（HPLC）Removing hydrophobic interfering substances from the sample matrix before analysis significantly improves analysis sensitivity and chromatographic column lifespan.

Item Number：057083

‌brand：Thermo Scientific™ / Dionex™

‌Product Name：OnGuard™ II RPPurification column

‌specification：‌1 mL (1 cc) ‌，Pack of 48branch/package

‌Filler type：Porous divinylbenzene resin (reverse phase,RP）

‌pHstability：‌0–14‌Suitable for processing strong acid and strong alkali samples

‌Solvent compatibility：0–100% HPLCGrade organic solvents (such as methanol, acetonitrile)

‌Applicable mode‌ Offline Solid Phase Extraction（SPE）Or online pre-processing

‌connection method：Ruhr connector, leak free design, compatible with syringes or automatic sampling systems

‌Application scenarios：Water quality analysis, food testing, environmental samples, biological matrix pretreatment, etc

Key advantage‌Compared to traditional methodsC18Silicone column, which‌Inorganic polymer filler‌atpH limitUnder high salt or high organic phase conditions‌No collapse, no degradation‌It is used to treat high interference substrates such as wastewater, biological fluids, and food extracts‌Irreplaceable choice‌

‌Product positioning‌

‌ Dionex OnGuard II RP 057083 ‌It's Thermo Fisher（Thermo Fisher Scientific）Specially designed for‌Ion chromatography（IC）Compared with high-performance liquid chromatography（HPLC）Sample pre-treatment‌design‌1 mLReverse phase solid-phase extraction（SPE）Protect the pillar‌Not a traditional analytical column, but used for‌Offline removal of hydrophobic interferents from sample matrix‌To enhance the sensitivity, reproducibility, and chromatographic column lifespan of subsequent analysis.

Core functions and application advantages

1.The purification column adopts‌Porous divinylbenzene resin（RPFiller)‌As an adsorption medium, it has high selective removal ability for the following substances: aromatic dyes、Partially aromatic carboxylic acids、hydrocarbon、surfactant、Unsaturated or aromatic organic compounds

2.By effectively removing these hydrophobic matrix interferences, ion chromatography can be significantly improved（IC）Yes, that's right‌Sensitivity of Trace Ion Detection‌；Reduce baseline noise and improve peak separation；Extend the service life of the analysis column and reduce the risk of blockage；Avoid contamination from mass spectrometry sources and improveLC-MSsystem stability

Usage and supporting equipment

‌Single column use‌Suitable for small batch sample processing, easy to operate.

‌Series use‌Enhance the ability to remove high concentration hydrophobic substances.

‌High throughput processing‌: Can cooperate‌ Dionex OnGuardSample pre-processing workstation‌, achieve‌most12Parallel processing of samples‌Significantly improve experimental efficiency‌

Typical application scenarios‌

This small column is widely used for pre-processing of the following difficult samples:

‌Trace bromate in drinking water‌（AN 101Method)

‌Determination of Iodine Content in Dairy Products‌（AN 37Method)

‌Ionic chromatographic analysis of iodine in urine‌（AU 140Method)

‌Removal of surfactants and dye residues in environmental water samples‌

‌Clearance of lipophilic interferents in biological samples (plasma, tissue homogenate)‌

‌Not applicable‌Not used for target enrichment or retention of analytes, only for‌Matrix purification‌The target object should‌Not reserved‌And directly through.