A calibration suspension unit has a container made of a flexible material that is filled with a calibration suspension for the calibration of a turbidity meter. There exists no air supernatant above the calibration suspension in the container. Further, a method for the manufacture of a calibration suspension unit is provided and its use for the calibration of a turbidity meter is described.

A hand-held microfluidic testing device is provided that includes a housing having a cartridge receiving port, a cartridge for input to the cartridge receiving port having a sample input and a channel, where the channel includes a mixture of Raman-scattering nanoparticles and a calibration solution, where the calibration solution includes chemical compounds capable of interacting with a sample under test input to the cartridge and the Raman-scattering nanoparticles, and an optical detection system in the housing, where the optical detection system is capable of providing an illuminated electric field, where the illuminating electric field is capable of being used for Raman spectroscopy with the Raman-scattering nanoparticles and the calibration solution to analyze the sample under test input to the cartridge.

A hand-held microfluidic testing device is provided that includes a housing having a cartridge receiving port, a cartridge for input to the cartridge receiving port having a sample input and a channel, where the channel includes a mixture of Raman-scattering nanoparticles and a calibration solution, where the calibration solution includes chemical compounds capable of interacting with a sample under test input to the cartridge and the Raman-scattering nanoparticles, and an optical detection system in the housing, where the optical detection system is capable of providing an illuminated electric field, where the illuminating electric field is capable of being used for Raman spectroscopy with the Raman-scattering nanoparticles and the calibration solution to analyze the sample under test input to the cartridge.

There is provided a test method for analyzing a body fluid in which a test tape is used in a test device to successively provide analytical test fields stored on the test tape, wherein body fluid is applied by a user to the test field provided at a time and the said test field is photometrically scanned using a measuring unit of the device to record measurement signals. To increase the measurement reliability, it is proposed that a control value is determined from a time-dependent and/or wavelength-dependent change in the measurement signals and that the measurement signals are processed as valid or discarded as erroneous depending on the control value.

A method is used for selecting a boundary sample. The method includes acquiring a deterioration trend of a new device by performing a deterioration acceleration treatment to the new device, acquiring deterioration trends of a plurality of repaired devices which have been repaired after long-term use by performing a deterioration acceleration treatment to the plurality of repaired devices, calculating an upper limit of deterioration of the repaired device based on the deterioration trend of the new device, and selecting a boundary sample indicating a limit state in which the device can be reused as a standard of reuse of the device by specifying a repaired device having the largest deterioration among the repaired devices having a deterioration not larger than the upper limit.

A calibration attachment for adjusting, calibrating, and/or performing a functional check of an optical sensor, which is configured to measure at least one measured variable in a medium by light, wherein the sensor is designed to emit transmitted light of at least one wavelength in the range of 200-700 nm, in particular 200-500 nm, includes a housing and a body, which is arranged in the housing, wherein the body includes praseodymium and cerium, and wherein the body, after excitation with the transmitted light, emits light of a different, in particular longer, wavelength. A sensor arrangement includes such a calibration attachment and use thereof.

Compositions and methods for increasing fluorescent signals generated by biomarkers are described. This serves to increase the accuracy of results when the biomarkers are used for the detection and diagnosis of physiological conditions, such as organ function and plasma volume.

A LIBS analysis system and method for liquids wherein a handheld LIBS analyzer has a nose section through which a laser beam passes. A sample holder positioner is attached to the nose section of the hand held LIBS analyzer. A sample holder is receivable in the sample holder positioner and includes a container for a liquid and an opening for filling the container with the liquid.

The present invention relates to charts, stacks and methods for evaluating skin color of a mammalian subject. The chart may include a substrate and an indicia visible from a first side of the substrate that includes a plurality of images of mammalian skin tones having varying degrees of yellowness, wherein each indicia is correlated with an index value. Also, the present invention relates to packaged topical cosmetic products that include a skin chart as well as to methods for evaluating anti-aging and skin lightening products.

A chlorophyll fluorescence measuring system having at least one spectrometer coupled to a data logger. The data logger provides direct control of the spectrometer and includes on-board memory for storage of target and reference spectrum data obtained by the spectrometer. The data logger may be coupled to an external computer that receives and analyzes target and reference spectrum data to determine SIF using a spectral fitting algorithm. The system may include a spectrometer aiming system coupled to and controlled by the data logger. The system may also include one or more environmental sensors configured to measure environment variables. The environmental sensors may be coupled to the data logger for control and data storage. The environmental data may be communicated to the external computer for use in the spectral fitting algorithm. The data logger may be connected to a network for remote monitoring and control.