28.進行atomic emission spectrophotometry分析時,使用下列何種氣體組合可以使溫度達到2500℃?
(A)Acetylene/compressed air
(B)Hydrogen/compressed air
(C)Methane/compressed air
(D)Natural gas/compressed air
30.依Van Deemter equation,下列何者非UPLC(ultra-HPLC)減少帶加寬效應(band broadening)之項目?
(A)漩渦擴散(Eddy diffusion)
(B)縱向擴散(Longitudinal diffusion)
(C)分析物於靜相之質量轉移抗力(Resistance to mass transfer)
(D)分析物於靜相孔隙中移動相之擴散抗力(Resistance to diffusion)