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兰化所 AT·PONA分析柱 气相色谱柱
面议兰化所 NO2-Toluene 硝基甲苯分析柱 气相色谱柱
面议兰化所 脂肪酸甲酯分析 柱 气相色谱柱
面议兰化所 变压器油分析 填充柱 气相色谱柱
面议兰化所气相色谱柱 苯系物分析 填充色谱柱
面议SGE BP5MS 气相色谱柱 毛细管柱 5%苯基二甲基聚硅氧烷
面议【SGE】054259 BP10 (1701)–14%氰丙基苯基聚硅氧烷 气相色谱柱
面议【SGE】054580 BPX90–90%氰丙聚硅亚苯基-硅氧烷 气相色谱柱
面议【SGE】原装_054622 BPX70 – 70%氰丙基聚硅苯-硅氧烷 气相色谱柱
面议【SGE】054471 BP21–硝基对苯二酸改性的聚乙二醇 气相色谱柱
面议【SGE】054433 BP20 (Wax) – 聚乙二醇 气相色谱柱
面议【SGE】054840 BP624 饮用水中的目标成分的分析 气相色谱柱
面议SUPELCO Astec CHIRALDEX G-DP手性气相色谱柱 毛细管柱
Incorporates a phase consisting of a 2,3-di-O-propionyl-6-t-butyl silyl derivative of γ-cyclodextrin. This phase exhibits good hydrolytic stability, broad chiral selectivity, and are excellent for aliphatic and aromatic amines. It is also good for many aliphatic and some aromatic esters as well as exhibiting high efficiency and resolution at low retention times for polar racemates.
Features:
Mechanism Observations:
Size Selectivity:
Both speed and sample capacity indicate a surface type mechanism for very polar racemates. Large bulky molecules still require a larger surface area than beta provides, therefore, an increase in selectivity is seen on the gamma derivative for fused ring structures. The smaller alpha cavity offered no selectivity while the beta covered the largest range of molecular sizes but the choice between beta and gamma is compound dependent for this phase.
SUPELCO Astec CHIRALDEX G-DP手性气相色谱柱 毛细管柱 订货信息:
Product # | Description |
78033AST | Astec CHIRALDEX G-DP 毛细管气相色谱柱 L × I.D. 30m × 0.25 mm, df 0.12 μm |