24301 Supelco β-DEX™ 110气相色谱柱L × I.D. 30 m × 0.25 mm, df 0.25 μm

24305-U Supelco β-DEX™ 120气相色谱柱L × I.D. 60 m × 0.25 mm, df 0.25 μm

24304 Supelco β-DEX™ 120气相色谱柱 L × I.D. 30 m × 0.25 mm, df 0.25 μm

SPB-1气相毛细管色谱柱 SPB-1 Capillary GC Column L × I.D. 60 m × 0.53 mm, df 5.00 μm

25345-U SPB-1气相毛细管色谱柱Supelco SPB-1气相毛细管色谱柱 SPB-1 Capillary GC Column L × I.D. 30 m × 0.53 mm, df 5.00 μm

25344 SPB-1气相毛细管色谱柱Supelco SPB-1气相毛细管色谱柱 SPB-1 Capillary GC Column L × I.D. 30 m × 0.53 mm, df 3.00 μm