UHPLC Guard Column Poroshell 120 SB-C18, 1.9 µm, 2.1 x 5 mm, 3/PAK

Poroshell 120 SB-C18 UHPLC guard column with inner diameter 2.1 mm, length 5 mm and particle size 1.9 µm. 3 pieces per package.

SB-C18 and SB-C8 are made from bulky silanes that sterically protect the siloxane bond. No acid labile endcapping reagents are used. The result is a significantly longer column lifetime and exceptional chemical and thermal stability at pH 1-6. The lack of endcapping also results in a different selectivity than endcapped EC-C18 and EC-C8.