LONG-CHAIN ALKYL-POLYSILOXANES AS NONPOLAR STATIONARY PHASES IN CAPILLARY GAS-CHROMATOGRAPHY
LONG-CHAIN ALKYL-POLYSILOXANES AS NONPOLAR STATIONARY PHASES IN CAPILLARY GAS-CHROMATOGRAPHY
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DOI：
10.1007/bf00325850
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发表时间：
1993-06-01
期刊：
影响因子：
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通讯作者：
BUYTEN, J
中科院分区：
文献类型：
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作者：
BALLSCHMITER, K;MENNEL, A;BUYTEN, J
一种新的甲基十八烷基聚硅氧烷相，具有明显的PCB分离选择性和显着改善的温度范围已被开发。甲基十八烷基聚硅氧烷分离多氯联苯的基本结构是根据邻位2，2 '和6，6'取代基的数目进行洗脱。首先洗脱2，2 '，6，6'-取代的同源物，而最后洗脱非2，2 '，6，6'-取代的共面PCB。与用于分离多氯联苯的标准固定相甲基-苯基（5%）聚硅氧烷（SE 54）相比，甲基-十八烷基聚硅氧烷在改进的多氯联苯分离中具有几个独特的特征。Sil 5 - 50% C18列解析PCB 31/28对，以及PCB 5/8、PCB 16/15/32、PCB 25/53、PCB 48/47、PCB 56/60、PCB 118/149、PCB 105、132、153和PCB 170/190组。所有这些分离都不能用SE 54柱实现。Sil 5 - 50% C18上的PCB 1 38/163对未观察到分离。Cl（x）B同系物的洗脱顺序揭示了相当严格的结构相关性。如果将结构/保留相关性扩展到所有209个Cl（x）B同系物，则可以区分20个具有一个环固定/一个环可变取代的基团。
A new methyl-octadecyl polysiloxane phase with a distinct selectivity in PCB separation and a significantly improved temperature range has been developed. The basic structural element of the separation of PCBs on methyl-octadecyl-polysiloxane is the elution according to the number of the substituents in the ortho-positions 2,2' and 6,6'. The 2,2',6,6'-substituted congeners are eluted first, while the non-2,2',6,6'-substituted coplanar PCB are eluted last. As compared to methyl-phenyl (5%) polysiloxane (SE 54) the standard stationary phase used for the separation of the PCBs, the methyl-octadecyl-polysiloxane has several unique features in an improved PCB separation. The Sil 5 - 50% C18 column resolves the pair PCB 31/28 and also the sets PCB 5/8, PCB 16/15/32, PCB 25/53, PCB 48/47, PCB 56/60, PCB 118/149, PCB 105, 132, 153, and PCB 170/190. All these separations are not achieved with a SE 54 column. No separation is observed for the pair PCB 1 38/163 on Sil 5 -50% C18. The order of elution of the Cl(x)B congeners reveals a rather stringent structure correlation. If the structure/retention correlation is extended to all 209 Cl(x)B congeners, 20 groups with one ring fixed / one ring variable substitution can be distinguished.