35.以毛細管電泳接紫外光偵測器分析抗氧化劑metabisulphite(S2O52- )時,下列何組背景電解質最適合?
(A)50 mM sodium phosphate, 50 mM sodium borate(pH 8.0) (B)50 mM Tris, 50 mM sodium dodecyl sulfate(pH 8.0) (C)50 mM Tris, 15 mM pyromellitic acid(pH 8.0) (D)50 mM Tris, 15 mM β-cyclodextrin
7.進行atomic absorption spectrophotometry分析時,使用下列何種氣體組合可以使火焰溫度達到3,000℃?
(A)acetylene-compressed air (B)acetylene-nitrous oxide (C)natural gas-compressed air (D)nitrous oxide-compressed air