Re: [學科] 分析化學的一些問題(有獎金唷)

看板Chemistry作者toplin (帶頭大哥)時間14年前 (2010/01/17 13:54)推噓2(2推 0噓 1→)

留言3則, 3人參與討論串2/2 (看更多)

※ 引述《airolg (恩)》之銘言： : 想請問各位大大一些問題 : 全部都是單選題我覺得題目出得很奇怪囧而且我沒有答案= = 剩下的1, 7, 8 : 1. what kind of LC column is used for ion-pair elution? : [1]ODS [2]Si [3] IXC [4]HIC [5]HILIC [1] ODS OctaDecylsilyl Silica 它就是C18，這個用在reversed-phase [2] Si Silica gel 很一般的column，normal phase [3] IXC Ion-EXchange Chromatography 名字透露了一切 [4] HIC Hydrophobic Interaction Chromatography 跟reversed-phase很像，不過多用在proteins & peptides [5] HILIC Hydrophilic Interaction LIquid Chromatography 屬於normal phase ion-pair是reversed-phase的一種應用所以選2 : 7.which statement in the following is correct? : [1] Si colum can not be used in a water containing mobile phase : [2] SFC si better than GC and HPLC : [3] GC is applicable to volatile componds only : [4] CE can analyze all the cationic, anionic and neutral solutes in the : same run : [5] reversed phase HPLC analyzes all the cationic, anionic and neutral : solutes in the same run [1] 可以用呀 [2] 通常這種選項都是錯的 [3] GC的G指的是mobile phase是gas，不代表只能用在gas [4] 是對的，電性不同，跑的速度不一樣 [5] 是看極性不是看電性 : 8. wich statement in the following is not correct? : [1]separation is due to the differential volatility of solutes by GC : [2]separation is due to the differential solubility of solutes in stationary : phase by GLC : [3]separation is due to the differential solubility of solutes in stationary : phase by LLC : [4]separation is due to the differential adsorption of solutes to stationary : phase by LSC : [5]separation is due to the differential migration of solutes on mobile phase : by TLC [1] 是錯的，應該是利用動靜相的分配其實大體來說，這題每個選項都是利用分配來分離差別只在各自的動靜相的不同而已假設有一個"XYC" X是動相，是一個推進的載體，看是gas還是liquid Y是靜相，也就決定了分離的方式，liquid的話就是solubility solid的話就是adsorption 有了中心思想後細節再繼續往下延伸影響solubility跟adsorption的因素有什麼？就會研發出相對應的管柱或應用當然原理在細節上會有所不同，但是追本溯源都是師出同門 -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 59.121.37.220

推

jiti

01/17 18:21, , 1^F

01/17 18:21, 1^F

推

airolg

01/18 22:15, , 2^F

01/18 22:15, 2^F

→

toplin

01/21 21:47, , 3^F

01/21 21:47, 3^F