單項(xiàng)選擇題電位分析法測(cè)量的電學(xué)參數(shù)是()

A.電流
B.電導(dǎo)
C.電量
D.電位


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1.單項(xiàng)選擇題AFS和AAS在應(yīng)用中的主要不同之處是()

A.測(cè)定元素的種類
B.精密度
C.檢測(cè)限
D.多元素同時(shí)測(cè)定

2.單項(xiàng)選擇題下述哪種干擾在AFS中比在AAS中更嚴(yán)重()

A.散射干擾
B.背景干擾
C.物理干擾
D.化學(xué)干擾

3.單項(xiàng)選擇題原子熒光光譜和原子吸收光譜儀在結(jié)構(gòu)上的主要區(qū)別是()

A.光源
B.光路
C.單色器
D.原子化器

4.單項(xiàng)選擇題下列哪種原子熒光是反Stokes熒光()

A.Cr吸收359.35nm,發(fā)射357.87nm
B.Pb吸收283.31nm,發(fā)射283.31nm
C.Pb吸收283.31nm,發(fā)射405.78nm
D.In吸收377.55nm,發(fā)射535.05nm

6.單項(xiàng)選擇題One of the main advantages of a graphite-furnace atomizer is that()

A.It requires only very small quantities of a sample
B.It requires metal.ions in aqueous solution
C.It does not produce background emission like a flame
D.It does not get hot like a flame

7.單項(xiàng)選擇題The purpose of the ashing step in graphite-furnace atomic-absorption spec-troscopy is to()

A.Vaporize metal atoms to be analyzed
B.Cause the metal species to form carbides which are more volatile
C.Convert the graphite furnace to ash to avoid carbide formation
D.Burn off organic species that would interfere with the elemental analysis

8.單項(xiàng)選擇題The purpose of the flame in flame atomic-absorption spectroscopy is to()

A.Purify the sample
B.Desolvate and atomize the analyte atoms in a sample
C.Excite the analyte atoms
D.Ionize the analyte atoms

9.單項(xiàng)選擇題A hollow-cathode lamp is()

A.A broad-band light source
B.A narrow-band light source
C.A light detector
D.Not a light source

10.單項(xiàng)選擇題可提高Al元素的原子化效率的方法是()

A.加快噴霧速度
B.降低火焰溫度
C.在待測(cè)溶液中加入消電離劑
D.用石墨爐原子化器代替火焰原子化器