Composite sampling of fluids

摘要

Composite sampling of a fluid flowing through a conduit includes collecting, in a vessel coupled to the conduit through which the fluid is flowing, a first discrete sample of fluid from the conduit, the first discrete sample having a first selected volume, and collecting, in the vessel and at a first interval from the first sample, a second discrete sample of the fluid from the conduit, the second discrete sample having a second selected volume, thereby forming a composite sample in the vessel while the vessel is coupled to conduit. The composite sample includes the first discrete sample and the second discrete sample, and may include one or more additional discrete samples. An apparatus for collecting the composite sample includes a gas chromatograph, and is arranged such that the composite sample is provided to the gas chromatograph without removing the composite sample from the apparatus or transporting the composite sample.

主权项

1. An apparatus comprising:
an inlet configured to receive a portion of a fluid flowing through a conduit; a valve coupled to the inlet; a pump coupled to the valve; a vessel coupled to the valve; and a gas chromatograph coupled to the valve, wherein the apparatus is configured to collect a composite sample in the vessel, the composite sample comprising two or more discrete samples of the fluid, each of the discrete samples collected at a selected interval from at least one other discrete sample and having a selected volume.