Abstract:
Techniques are described for the detection of multiple target species in real-time PCR (polymerase chain reaction). For example, a system comprises a data acquisition device and a detection device coupled to the data acquisition device. The detection device includes a rotating disk having a plurality of process chambers having a plurality of species that emit fluorescent light at different wavelengths. The device further includes a plurality of removable optical modules. Each of the removable optical modules is optically configured to excite the species and capture fluorescent light emitted by the species at different wavelengths. A fiber optic bundle coupled to the plurality of removable optical modules conveys the fluorescent light from the optical modules to a single detector.
Abstract:
Techniques are described for the detection of multiple target species in real-time PCR (polymerase chain reaction). For example, a system is described that includes a data acquisition device and a detection device coupled to the data acquisition device. The detection device includes a rotating disk having a plurality of process chambers having a plurality of species that emit fluorescent light at different wavelengths. The device further includes a plurality of optical modules. Each of the optical modules is optically configured to excite the species and capture fluorescent light emitted by the species at different wavelengths. A fiber optic bundle coupled to the plurality of optical modules conveys the fluorescent light from the multiple optical modules to a single detector.
Abstract:
The invention relates to an arrangement for continuous determination of a substance comprising a chemically reacting sensor element (21) arranged in or adjacent to a limiting wall of a volume (22) containing the substance, where in a housing (2) of a modular device (1) optical elements to read the sensor element (21) are arranged, comprising at least one light source (35) illuminating the sensor element (21) and at least one sample detector (29) detecting the light scattered by the sensor element (21), and where a front side of the housing (2) comprises a coupling for the sensor element (21), so that the sensor element (21) may be interchangeably and modularly coupled to the front side of the housing (2). A glass body (24) is arranged adjacent to the coupling for direct contact with the sensor element (21) and separate conduits (34, 31) for the illuminating and for the scattered light are arranged rearward of the glass body (24). The modular device (1) allows for easily interchanging the modular sensor element (21) and provides an optical connection between the sensor element (21) and the detector (29) which is steady and allows for high quality measurements.
Abstract:
A device for colorimetrically measuring the concentration of a single parameter in a liquid sample. The device comprises a pump, an analytical cassette, a sensor with a continuous flux measurement vessel, and an electronic control module. The device further comprises a repetitive calibrating means which may be used at any time and includes a means for drawing a straight calibration line through three points; a repetitive means for sampling measurements on stable segments of a constant portion of the analytical curve; and a means for phasing the sampling means.
Abstract:
A sensor module and method for determining and imaging fluorescence lifetime based on the time-of-flight values are disclosed. The sensor module comprises an opaque housing (OH) having a first chamber (CH1) and a second chamber (CH2) which are separated by a non-transparent barrier (LB). Further, it comprises an optical emitter (OE) arranged in the first chamber (CH1) and configured to emit light through a first aperture (AP1). Pulsed excitation light of a specified wavelength is directed to optically excite a fluorescent probe (FP) positioned in the optical path of the excitation light. The module also comprises a detector (MD) arranged in the second chamber (CH2) and configured to detect through a second aperture (AP2) photons originating from the fluorescent probe (FP). The module further comprises: a measurement block (MB) configured to determine a temporal difference between an arrival time of one of the received photons with respect to the emission pulses; a histogram block (HIST) configured to accumulate the difference values in a histogram; a processing circuit (PRC) configured to compute time-of-flight values based on an evaluation of the histogram and then to compute a fluorescence lifetime from the time-of-flight values and generate an output signal (OS) being indicative of the fluorescence lifetime of the fluorescent probe; and a control unit (CU) configured to initiate pulsed emission of the optical emitter (OE).
Abstract:
The invention relates to a measuring device ready for analysing a luminescent sample and in particular for measuring the concentration of at least one analyte in a luminescent sample, comprising: a housing having a sample receiving chamber for receiving a sample container; a sample container for receiving the luminescent sample; a radiation receiver device for receiving radiation emitted by the luminescent sample, and an evaluation device for evaluating the radiation received by the radiation receiver device from the luminescent sample. Moreover the invention provides a measuring device comprising a base part and a measurement head interchangeably disposed on the base part, wherein the measurement head is designed for analysing a luminescent sample or as a spectrometer measurement head.
Abstract:
An efficient absorption spectroscopy system is provided. The spectroscopy system may be configured to measure solid, liquid or gaseous samples. Vacuum ultra-violet wavelengths may be utilized. Some of the disclosed techniques can be used for detecting the presence of trace concentrations of gaseous species. A preferable gas flow cell is disclosed. Some of the disclosed techniques may be used with a gas chromatography system so as to detect and identify species eluted from the column. Some of the disclosed techniques may be used in conjunction with an electrospray interface and a liquid chromatography system so as to detect and identify gas phase ions of macromolecules produced from solution. Some of the disclosed techniques may be used to characterize chemical reactions. Some of the disclosed techniques may be used in conjunction with an ultra short-path length sample cell to measure liquids.