| CPC G01N 35/04 (2013.01) [B01L 3/5453 (2013.01); B01L 9/06 (2013.01); B65G 43/08 (2013.01); B65G 47/902 (2013.01); G01N 35/00584 (2013.01); G01N 35/0099 (2013.01); G01N 35/1079 (2013.01); B01L 2300/021 (2013.01); B65G 2201/0235 (2013.01); B65G 2203/044 (2013.01); G01N 2035/00752 (2013.01); G01N 2035/0406 (2013.01); G01N 2035/0494 (2013.01); G01N 2035/103 (2013.01)] | 14 Claims |

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1. A receptacle delivery system for an instrument, comprising:
a carriage configured to move from a first location of the instrument to a second location of the instrument;
a puck supported by the carriage, wherein the puck is configured to removably support a receptacle such that a longitudinal axis of the receptacle is substantially coincident with a vertical axis of the puck; and
a first shelf positioned at the second location of the instrument, wherein the first shelf comprises (a) a base extending substantially transverse to the vertical axis of the puck and (b) a first opening formed in the base, wherein, when the carriage is positioned at the second location, the longitudinal axis of a receptacle seated in the puck extends through the first opening, and wherein a top surface of the base comprises a recessed pathway defined between a projection extending upward from the top surface of the base and a sidewall circumscribing the base.
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