Patent ID: 11951480
Assignee: RESTEK CORPORATION
Field: Measurement (Instruments)
Classification: CPC B  G  H | IPC B

Claim 10:
11. A solid phase microextraction device, comprising:
a substrate having a first planar surface defined by:
a base edge;
a spray edge disposed distal across the substrate from the base edge, the spray edge including a tapering tip extending away from the base edge;
a first lateral edge extending from the base edge to the tapering tip; and
a second lateral edge extending from the base edge to the tapering tip, the second lateral edge being disposed distal across the substrate from the first lateral edge; and

a first sorbent layer disposed on the first planar surface and extending a sampling length from the spray edge toward the base edge, the first sorbent layer including first sorbent particles; and
second sorbent particles disposed on at least one of:
the first planar surface such that the second sorbent particles are disposed as a second homogenous portion of the first sorbent layer and the first sorbent particles constitute a first homogenous portion of the first sorbent layer, the second sorbent particles being compositionally distinct from the first sorbent particles; or
a second planar surface as a second sorbent layer, the second planar surface being rotationally displaced about the sampling length from the first planar surface, the second sorbent particles being physically remote from the first sorbent particles, and the second sorbent particles being compositionally distinct from the first sorbent particles or compositionally identical to the first sorbent particles.