Abstract:
The present teachings relate to a method and system for normalizing spectra across multiple instruments. The method (800) comprises at least one reference instrument and a test instrument. Each instrument comprises at least one excitation filter and at least one emission filter arranged in pairs. Each instrument further comprises a pure dye plate comprising a plurality of wells. Each well contains a plurality of dyes where each dye comprises a fluorescent component. Fluorescent spectra are obtained from each instrument (805, 820) for each dye across multiple filter combinations to contribute to a pure dye matrix Mref for the reference instrument and pure dye matrix M for the test instrument. The pure dye spectra can then be multiplied by correction factors (840) for each filter pair to result in corrected pure dye spectra, then normalized (845) and the multicomponenting data can be extracted (850).
Abstract:
Disclosed herein is a method for improving the precision of a test result from an instrument with an optical system that detects a signal. The method comprises including in the instrument a normalization target disposed directly or indirectly in the optical path of the optical system. Also disclosed are instruments comprising a normalization target, and systems comprising such an instrument and a test device that receives a sample suspected of containing an analyte.
Abstract:
Absorption-biased NDIR gas sensors can be recalibrated by adjusting a calibration curve obtained from a gamma ratio ("G") that has been normalized by the gamma ratio when no sample gas is present in the sample chamber ("G o "), G being the ratio of a signal channel output ("V s ") of the NDIR gas sensor divided by a reference channel output ("V R ") of the NDIR gas sensor. An AB NDIR gas sensor uses an identical spectral narrow band pass filter for wavelength selection for both a signal channel having a signal channel pathlength and a reference channel having a reference channel pathlength and an absorption bias is applied to the signal channel by making the signal channel path length longer than the reference channel pathlength. Recalibration can be achieved by adjusting Go based upon a reversed calibration curve algorithm that uses a concentration of sample gas determined by a master NDIR gas sensor. Alternatively, the NDIR gas sensor can be self- recalibrating by using a stored standard gamma ratio and a measured standard gamma ratio and a self-calibration algorithm to correct the calibration curve.
Abstract translation:吸收偏置的NDIR气体传感器可以通过调节从样品室中没有样品气体(“Go”)已经被γ比值归一化的伽马比(“G”)获得的校准曲线,G为 NDIR气体传感器的信号通道输出(“Vs”)除以NDIR气体传感器的参考通道输出(“VR”)的比率。 AB NDIR气体传感器使用相同的光谱窄带通滤波器用于具有信号通道路径长度的信号通道和具有参考通道路径长度的参考通道的波长选择,并且通过使信号通道将吸收偏压施加到信号通道 路径长度大于参考通道路径长度。 可以通过基于使用由主NDIR气体传感器确定的样品气体浓度的反向校准曲线算法调整Go来实现重新校准。 或者,NDIR气体传感器可以通过使用存储的标准伽马比率和测量的标准伽马比率以及自校准算法来校正校准曲线来自我重新校准。
Abstract:
A method of determining auto-calibrating information of a test sensor includes providing an optical read head that includes a light source, a light guide and a detector. The read head forms an opening that is sized to receive a test sensor. The detector includes a linear-detector array or single detector. A test sensor is provided having apertures formed therein. The test sensor is placed in the opening of the optical read head. Light is transmitted from the light source through the apertures. The light transmitted through the apertures using the detector or detecting the absence of light being transmitted through the test sensor using the detector is detected. The detected light or the absence of detected light information from the detector is used to determine the auto-calibration information of the test sensor.
Abstract:
Various methods for controlling one or more parameters of a flow cytometer type measurement system are provided. One embodiment includes monitoring parameter(s) of the measurement system during measurements of sample microspheres. The method also includes altering the parameter(s) in real time based on the monitoring. Another method includes monitoring a temperature proximate to the measurement system. One such method includes altering a bias voltage of an avalanche photo diode in response to the temperature using empirically derived data. A different such method includes altering output signals of a photomultiplier tube in response to the temperature using a characteristic curve. Some methods include monitoring a temperature of a fluid, in which sample microspheres are disposed, that will flow through the flow cytometer type measurement system. This method also includes determining a velocity of the sample microspheres in the measurement system from a viscosity of the fluid at the temperature.
Abstract:
A calibration curve generation device includes an estimation unit that estimates a plurality of independent components or main components constituting observation spectral data of a plurality of samples and a regression formula calculation unit that acquires a regression formula of a calibration curve based on glucose concentration of the plurality of samples and a mixing coefficient of the independent components or the main components in the observation spectral data for each of the samples. The estimation unit selects a component waveform signal having a peak in a wavelength selected in advance as the independent components or the main components.
Abstract:
Absorption-biased NDIR gas sensors can be recalibrated by adjusting a calibration curve obtained from a gamma ratio ("G") that has been normalized by the gamma ratio when no sample gas is present in the sample chamber ("G o "), G being the ratio of a signal channel output ("V s ") of the NDIR gas sensor divided by a reference channel output ("V R ") of the NDIR gas sensor. An AB NDIR gas sensor uses an identical spectral narrow band pass filter for wavelength selection for both a signal channel having a signal channel pathlength and a reference channel having a reference channel pathlength and an absorption bias is applied to the signal channel by making the signal channel path length longer than the reference channel pathlength. Recalibration can be achieved by adjusting Go based upon a reversed calibration curve algorithm that uses a concentration of sample gas determined by a master NDIR gas sensor. Alternatively, the NDIR gas sensor can be self- recalibrating by using a stored standard gamma ratio and a measured standard gamma ratio and a self-calibration algorithm to correct the calibration curve.
Abstract:
The present invention relates to a method for determining, from a database, the amount of at least some fatty acids contained in various biological materials from a single animal raised for meat production. Said method can be used for determining the amount of both major and minor fatty acids, as well as the fatty acid content of another biological material from said single animal.