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moving ribbon devices with pre-concentrating techniques, in a similar manner to that of Scott et al., but
were rather unsuccessful. Their final system was rather crude but, nevertheless, an effective transport
system that utilized the principle of the rotating disk. Their final model took the form of a carousel of
cups containing potassium chloride.

Figure 8.1
Carousel Transport for On-line IR
Monitoring of LC Column Eluents

A diagram of their carousel is shown in Figure 8.1. The carousel was very similar to a fraction collector,
and consequently the device might be considered more like an off-line auto fraction collector than an
in-line interface. In fact, all transport interfaces might be deemed automated offline monitoring device,
depending on the speed of the transport process. Fast transport, as with the wire or belt transport
interface used in LC/MS, gives the impression of being an in-line devices. Conversely, the carousel
transport interface described here, being relatively slow, appears more like an automated off-line IR
sampler.

The LC/IR interface carousel had 32 cups, each fitted with a fine mesh screen and containing potassium
chloride powder. The position of the