31 下列皆為氣相層析使用之固定相,何者對甲醇之親和力最大?
(A)squalane
(B)polydimethyl siloxane(OV-1)
(C)poly(dicyanoalkyldimethyl)siloxane
(D)polyethylene glycol(carbowax 20M)
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統計: A(248), B(177), C(143), D(2885), E(0) #411462
統計: A(248), B(177), C(143), D(2885), E(0) #411462
詳解 (共 2 筆)
#1415093
記:固定相極性大小
Squalane (hydrocarbon) 極性最小
Silicone OV-1 < OV-17 < OV-225 數字愈大極性愈大
Carbowax (polyethlene glycol, PEG) 極性最大
甲醇是極性物質,like dissolve like
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