We successfully fabricated 45 μm bore microchannels in PVA-Poly(styrenesulfonate) cation exchange polymers. by casting aqueous prepolymer mixtures around fine tungsten wire mandrels, curing, crosslinking by thermal annealing, and subsequently removing the microwire. This was then used as a chemically regenerated microsuppressor (with a cleaner MS background than its commercial macro counterparts) for open tubular ion chromatography, with an integrated tubular conductivity cell, tested to backpressures up to 600 psi. The overall system permits detection limits for common inorganic ions in the low μg/L levels with a 4-nL injection, isocratic elution and regeneration with poly(styrene sulfonic acid).

我们成功地在 PVA-聚（苯乙烯磺酸盐）阳离子交换聚合物中制造了 45 μm 孔径的微通道。通过在细钨丝心轴周围浇铸含水预聚物混合物，固化，通过热退火交联，然后去除微丝。然后将其用作开放管式离子色谱的化学再生微抑制器（具有比其商业宏观对应物更干净的 MS 背景），具有集成的管式电导池，背压测试高达 600 psi。整个系统允许通过 4-nL 进样、等度洗脱和聚（苯乙烯磺酸）再生对低 μg/L 水平的常见无机离子进行检测。