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Achieving a Peak Capacity of 1800 Using an 8 m Long Pillar Array Column
Analytical Chemistry ( IF 6.7 ) Pub Date : 2019-08-14 00:00:00 , DOI: 10.1021/acs.analchem.9b02236
Martyna Baca 1 , Gert Desmet 1 , Heidi Ottevaere 2 , Wim De Malsche 1
Affiliation  

In the present study, the peak capacity potential of ultralong porous cylindrical pillar array columns is investigated. Coupling 4 columns of 2 m long allows for working near the minimal separation impedance of small molecules under retained conditions at a maximal pressure load of 250 bar. Minimal plate heights of H = 5.0 μm, H = 6.3 μm, and H = 7.7 μm were obtained for uracil (unretained), butyrophenone (k = 0.85), and valerophenone (k = 1.94), respectively, corresponding to a number of theoretical plates of N = 1.6 × 106, N = 1.2 × 106, and N = 1.0 × 106. The optimal linear velocities were 0.60 mm/s for a retained compound and 0.74 mm/s for an unretained compound. Based on a mixture of 9 compounds, the peak capacity nc was determined as a function of gradient time (tG). Peak capacities (tG-based) of 1103 and 1815 were obtained when applying 650 min and 2050 min gradients (tG/t0 = 4.5 and 14, respectively, with tG as the gradient time and t0 as the void time). These values are much higher than earlier reported peak capacity values for small molecules.

中文翻译:

使用8 m长的柱阵列色谱柱达到1800的峰容量

在本研究中,研究了超长多孔圆柱柱阵列柱的峰值容量潜力。耦合4个2 m长的色谱柱可在保留条件下以250 bar的最大压力负载在小分子的最小分离阻抗附近工作。尿嘧啶(未保留),丁酮(k = 0.85)和戊二酮(k = 1.94)的最小平板高度分别为H = 5.0μm,H = 6.3μm和H = 7.7μm ,对应于许多理论值。板的N = 1.6×10 6N = 1.2×10 6N = 1.0×10 6。最佳的线速度对于保留的化合物为0.60 mm / s,对于未保留的化合物为0.74 mm / s。基于9种化合物的混合物,确定峰容量n c作为梯度时间(t G)的函数。当应用650 min和2050 min梯度时(分别为t G / t 0 = 4.5和14,其中t G为梯度时间,t 0为无效时间),获得的峰容量(基于t G)为1103和1815。。这些值远高于早先报道的小分子峰容量值。
更新日期:2019-08-14
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