A1308.26nm(I)的谱线强度为8级,309.27nm(I)的谱线强度为9级。采用光谱分析确定试样中A1是否存在时,若前一谱线在试样谱带中出现而后一谱线未出现,可判断试样中有A1存在。 ( )
A.CH3-OOC-CH2CH3
B.(CH3)2CH-O-CH(CH3)2
C.CH3-OOC-CH2-COO-CH3
D.CH3CH2-OOC-CH2CH2-COO-CH2CH3
A . CH3CH2CH2COCH3
B . (CH3)2CHCOCH3
C . (CH3)3CCHO
D . CH3CH2COCH2CH3
A.(CH3)2CHCOOC2H5
B.CH3CH2COOCH2CH2CH3
C.CH3(CH2)3COOCH3
D.CH3COO(CH2)3CH3