A gasoline blend spot sampling system and method including an adjustable volume mechanism for retaining an adjustable volume of gasoline for sampling, a coolant system integrated with the adjustable volume mechanism, and a sample collection assembly using a blunt-end tube for use with an open-mouthed bottle. Various three-way valves are actuated to route gasoline through various stages of a sampling process, from a gasoline fast loop to a purge loop to a gasoline capture stage to a sample bottling stage.

Systems, apparatuses, and methods for enhancing handling of a sample cylinder may include first, second, and third stations, each configured to receive a sample cylinder containing a material sample. The first station may include a first mounting fixture configured to be attached to the sample cylinder, a viewing glass to facilitate inspection of a portion of the material sample, and a first valve configured to remove a portion of the material sample from the sample cylinder. The second station may include a second mounting fixture and a second valve to provide fluid flow between a source of pressurized gas and the sample cylinder, thereby to pressurize the sample cylinder. The third station may include a third mounting fixture configured to be attached to the sample cylinder and a third valve to provide fluid flow between the sample cylinder and ventilation ductwork or a receptable.

A multiple port connecting assembly includes a connector body and a fluid isolation adapter. The connector body includes a first fluid passage extending from an adapter port to a first connector port, a second fluid passage extending from the adapter port to a second connector port, a first seat portion disposed between the first fluid passage and the second fluid passage, and a second seat portion disposed between the second fluid passage and an open end portion of the adapter port. The fluid isolation adapter is removably assembled with the adapter port and includes an adapter body defining a first end passage that connects with the first fluid passage, a second end passage that connects with the second fluid passage, a first seal portion sealing against the first seat portion, and a second seal portion sealing against the second seat portion.

A multiple port connecting assembly includes a connector body and a fluid isolation adapter. The connector body includes a first fluid passage extending from an adapter port to a first connector port, a second fluid passage extending from the adapter port to a second connector port, a first seat portion disposed between the first fluid passage and the second fluid passage, and a second seat portion disposed between the second fluid passage and an open end portion of the adapter port. The fluid isolation adapter is removably assembled with the adapter port and includes an adapter body defining a first end passage that connects with the first fluid passage, a second end passage that connects with the second fluid passage, a first seal portion sealing against the first seat portion, and a second seal portion sealing against the second seat portion.