Abstract:
The present invention provides a set of dispensing tips comprising, a first dispensing tip comprising a lumen and a sealable lower end, and a second dispensing tip, wherein the second dispensing tip is sized to enter the lumen of the first dispensing tip. The first and second dispensing tips can connect to separate dispensing stems, as part of a chemistry analyzer. The first dispensing tip may be used as a cuvette, a reservoir, a reaction chamber, an incubation chamber, or dilution chamber. Also provides is a method for sample, handling comprising, aspirating the sample within a first dispensing tip, sealing a lower end of the first dispensing tip to produce a sealed dispensing tip, inserting a second dispensing tip within the sealed dispensing tip, and either reaspirating the sample, dispensing one or more fluids, or both, within the sealed dispending tip.
Abstract:
The present invention provides a photometric reference member comprising PTFE and glass. The member exhibits an absorbance change of less than 0.0001 absorbance units per degree C. over a range of temperatures, preferably from about 20null C. to about 40null C., and over wavelengths from about 600 nm to about 1650 nm, preferably about 600 nm to about 1050 nm. The invention also pertains to methods of using the photometric reference member to correct for temperature variations or drift in absorbance measurements.
Abstract:
An artificial member that mimics the absorbance spectrum of an animal body part and includes the spectral components of blood analytes is disclosed. The artificial member is made of a light scattering and reflecting material and is configured to be reproducibly received in a measuring receptor that is operatively connected to a non-invasive monitoring device.