Question

To which kinds of analytes do these liquid chromatography detectors respond?

(a) ultraviolet

(b) refractive index

(c) evaporative light scattering

(d) charged aerosol

(e) electrochemical

(f) fluorescence

(g) nitrogen chemiluminescence

(h) conductivity

Short answer

The part (a), part (b), part (c), part (d), part (e), part (f), part (g), part (h) is

1. Wavelengths below 210
2. Its detection limit is about poorer than that of the ultraviolet detector
3. significantly less volatile than the mobile phase
4. Itsnearly equal response to equal masses of non-volatile analytes
5. Chromatography detector responds to analytes that can be oxidized or reduced
6. Chromatography detector responds only to the few analytes that fluoresce
7. Chromatography detector responds to the molecules with N atom
8. Chromatography detector responds ionic or ionizable compounds

Step-by-step solution

Ultraviolet

Part (a)

The ultraviolet liquid chromatography detector is selective for compounds with wavelengths above 210 nm and is universal for compounds with wavelengths below 210.

Refractive index

Part (b)

The refractive index liquid chromatography detector responds to almost every solute, but its detection limit is about poorer than that of the ultraviolet detector.

Evaporative light scattering

Part (c)

The evaporative light scattering liquid chromatography detector responds to any analyte that is significantly less volatile than the mobile phase.

Charged aerosol

Part (d)

The charged aerosol liquid chromatography detector is almost universal detector with nearly equal response to equal masses of non-volatile analytes.

Electrochemical

Part (e)

The electrochemical liquid chromatography detector responds to analytes that can be oxidized or reduced (for example it can be phenols, aromatic amines).

Fluorescence

Part (f)

The fluorescence liquid chromatography detector responds only to the few analytes that fluoresce.

Nitrogen chemiluminescence

Part (g)

The nitrogen chemiluminescence liquid chromatography detector responds to the molecules with N atom.

Conductivity

Part (h)

The conductivity liquid chromatography detector responds ionic or ionizable compounds.