Cone splitter

Cone splitter, as shown in Fig. 25, used in general injection applications for up to 8-way splitting and claimed (Hilbert, 1982) to achieve 10% accuracy in splitting. It should be noted that such figures depend more on the design of the pipe branches downstream of the splitter, rather than the splitter itself. 

FIGURE 7 Subsampling (a) coning and quartering (b) table sampler [6] (c) oscillating hopper (paddle) sample divider [6] (d) spinning riffler (BSI) (e) riffle/chute splitter (BSI) if) revolving sample splitter [14]. 

A similar unit may be installed in a feed pipe down which particulate material is flowing. In this unit the splitter cones are mounted within the feed pipe and the sample falling through the segmental slots passes out of a side pipe, while the remainder flows over the cone and continues down the feed pipe. Since the whole of the stream is not taken for many short intervals of time, non-representative sampling is possible. 

A sample splitter described by Fooks [24] consists of a feeder funnel through which the sample is fed. It passes on to the apex of two resting cones, the lower fixed and the upper adjustable by means of a spindle. Segments are cut from both cones and by rotation of the upper cone the effective area of the slits can be varied to vary the sampling proportion. Material, which falls through the segmental slots, is passed to a sample pot. The residue passes over the cone and out of the base of the unit. 

Detector MS, Micromass Quatro Micro LC triple quadrupole, electrospray interface, positive ion mode, capillary voltage 3.5 kV, source 100°, desolvation 150°, nebulizing gas nitrogen at 365 L/h, collision gas argon at 3.5 jrbar, cone 40 V, collision energy 38.0 eV, m/z 612.40-100.10 (The make-up liquid was EtOHilO mM ammonium acetate 95 5 pumped at 0.25 mL/min, which mixed with the column effluent. A splitter was used so that 0.2 mL/min entered the detector.)... 

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