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戴安公司生產(chǎn)的儀器主要有離子色譜儀、高效液相色譜儀、快速溶劑萃取儀和氨基酸直接分析儀。其中離子色譜儀憑借著雄厚的技術(shù)優(yōu)勢和方法已廣泛地應用于各個領(lǐng)域，其*達80%。與離子色譜相關(guān)的文章有90%均出自戴安公司生產(chǎn)的離子色譜儀。　　
戴安公司的快速溶劑萃取儀15分鐘之內(nèi)僅用15毫升溶劑既可完成對10g樣品的萃取，該技術(shù)已在環(huán)境、藥物、食品和聚合物工業(yè)等領(lǐng)域得到廣泛應用。

詳細介紹

IonPac AS19 Hydroxide-Selective Anion-Exchange Column

For Determination of Oxyhalides and Inorganic Anions

The IonPac^? AS19 hydroxide-selective anion-exchange column is specifically designed for trace bromate in drinking water. Its high capacity and selectivity allow the determination of bromate in drinking water at the low-μg/L level. The IonPac AS19 columns meets the performance requirements of US EPA Methods 300.0 and 300.1.

The new IonPac AS19 Capillary Column is packed with the same material as the equivalent standard bore version (providing the same performance as a 4 mm column), but requires only 1/100th the eluent flow rate.The capillary format provides the advantage of significantly reduced eluent consumption, which helps reduce operating costs.

Recommended hydroxide-selective column for trace bromate in drinking water matrices
High capacity: 240 μeq per column (4 × 250 mm)
Meets or exceeds performance requirements of US EPA Methods 300.0 and 300.1
Column selectivity is optimized for 30 °C operating temperature
Compatible with organic solvents
Low background signal and enhanced analyte sensitivity with the ASRS^? 300 and an RFIC system

The IonPac AS19 is designed for the analysis of oxyhalides and common inorganic anions including fluoride, chlorite, bromate, chloride, nitrite, bromide, chlorate, nitrate, phosphate, and sulfate in drinking water, groundwater, wastewater, and other diverse sample matrices. The IonPac AS19 allows analysis of most drinking water without the use of sample pretreatment or preconcentration. This column is ideally used with an RFIC system for automatic eluent generation.

The key application for the IonPac AS19 is the determination of trace bromate in drinking water matrices using a potassium hydroxide gradient with suppressed conductivity detection. The selectivity of the AS19 ensures that bromate can be quantified at low μg/L concentrations using suppressed conductivity detection even in the presence of very high concentrations of chloride, sulfate, and carbonate.

Note: Use the Anion Self-Regenerating Suppressor (ASRS 300) with the IonPac AS19 column for eluent suppression.

IonPac AS19 Anion-Exchange Column Specifications
Dimensions	IonPac AS19 Analytical Column: 2 × 250 mm and 4 × 250 mm IonPac AG19 Guard Column: 2 × 50 mm and 4 × 50 mm IonPac AS19 Capillary Column: 0.4 × 250 mm IonPac AG19 Capillary Guard Column: 0.4 × 50 mm
Maximum operating pressure	4000 psi (standard and microbore) 5000 psi (capillary)
Ion-exchange group	Functional Group: Alkanol quaternary ammonium ion
Functional group characteristics	Ultralow hydrophobicity
Capacity	2.4 ?eq (0.4 × 250 mm capillary column) 0.06 ?eq* (0.4 × 50 mm capillary guard column) 60 ?eq (2 × 250 mm analytical column) 1.5 ?eq* (2 × 50 mm guard column) 240 ?eq (4 × 250 mm analytical column) 6 ?eq* (4 × 50 mm guard column) *Guards are packed with a low-capacity microporous resin.
Column construction	PEEK with 10-32 threaded ferrule-style end fittings. All components are nonmetallic.
Substrate characteristics	Bead Diameter and Pore Size: 7.5 ?m (0.4 x 250, 2 × 250 and 4 × 250 mm); super macroporous resin (2000 ?) 12 ?m (0.4 x 50, 2 × 50 and 4 × 50 mm); microporous resin (<1 ?) Cross-Linking (%DVB): 55%
phase compatibility	pH 0–14; 0–100% HPLC solvents