Abstract:
The content of casein in milk is determined by two measurements of infrared absorbance in a milk sample by infrared spectrometry before and after a separation of the casein. The casein content is calculated by use of absorbance data recorded during the two absorbance measurements. The new method is considerable faster than the known wet-chemical methods, such as the normal wet chemical reference method for casein determination in milk using a Kjeldahl nitrogen determination of the milk sample, then a coagulation of the milk, and finally a Kjeldahl nitrogen determination of the filtrate. Further the new method provides a more reliable accuracy than the know determination using a single infrared analysis of a milk sample.
Abstract:
The present invention relates to a method of determining a constituent of a sample and more specifically, to a method of correcting an absorbance value for a spectrometer. The method is especially applicable in connection with spectrometric analysis instruments for quantitatively determining the chemical composition of fluids, e.g. the content of fat, protein lactose or urea, in food products, especially in raw milk or dairy products. The method is based upon a measurement of one or more selected ranges of a spectrum, providing an absorption spectrum of the product. The method may be applicable in connection with all spectroscopic instruments giving rise to specific ranges of a spectrum, such as UV, VIS, NIR, IR, NMR, MS, etc.). Typically, the spectrum will be a MID-IR absorption spectrum.
Abstract:
The invention relates to measuring instruments, preferably of the kind measuring absorbances, in an object, of electromagnetic radiation in at least two spectral ranges, such as IR instruments, and DXR, meaning Dual X-ray instruments, and more specifically to the determination of properties of food or feed, such as the fat content in milk or meat. The invention relates in particular to a method of providing a correction for a slave instrument of the kind measuring properties of an object by exposing the object to electromagnetic radiation, in particular X-rays, in at least two spectral ranges and obtaining one or more object responses thereto. The responses obtained being preferably based on detecting attenuation and/or reflection and/or scatter of the electromagnetic radiation in/from the object by use of one or more detectors and are obtained in a form where they express properties of the object either directly or via a transformation.
Abstract:
A sample container system for use in a method for determining dietary fiber comprises a sample container and a magnetic mixer. The sample container has a floor and a rigid side-wall upstanding therefrom to together delimit a sample containing space, wherein the floor includes a porous filter portion. The magnetic mixer has at least one concentrically arranged rotor-stator, each of the at least one concentrically arranged rotor-stator including a rotor and a stator, the rotor and the stator defining therebetween an annular shear gap, the rotor configured to rotate relative to the stator, the stator including a stator body having a first plurality of openings therethrough, the rotor including a magnetic coupling and a rotor body having a second plurality of openings therethrough, the magnetic coupling configured to couple with and follow an externally generated rotating magnetic field to cause the rotor to rotate in relation to the stator.
Abstract:
A sampling device comprises a receptacle having an inner material receiving space defined by a side wall portion and a bottom wall portion and having a receptacle opening; and a sample container being adapted to close the receptacle opening when collocated with the receptacle. The sample container includes: a sample receiving portion which, when collocated with the receptacle is located in liquid communication with the inner material receiving space; a sample well positioned radially outside of the sample receiving portion in a direction perpendicular to a longitudinal axis, the sample well having a well opening; a liquid passageway for directing liquid from the sample receiving portion towards the well opening; a container having a container opening; and a liquid impermeable barrier for preventing liquid entering the container opening from the sample receiving portion).
Abstract:
A method of performing an optical analysis of a liquid containing dissolved gas includes transferring an amount of the liquid containing the dissolved gas from a reservoir into a holder of a flow system of the optical analyser, holding the amount of the liquid in the holder at around ambient pressure for a period such that a portion of the dissolved gas is expelled from the amount of liquid held in the holder while the holder is open to a waste reservoir, transferring at least a portion of the amount of the liquid containing the dissolved gas held in the holder under a pressure above ambient into a measurement cell of the optical analyser as a liquid sample, and performing the optical analysis of the liquid sample from a detection of optical radiation by an optical detector after its interaction with the liquid sample in the measurement cell.
Abstract:
A sample container for use in determining a dietary fiber content of a food sample may include a chamber having a first end, an opposing second end, and a side-wall connecting the first end to the second end. The side-wall may include a rigid, non-porous material. The sample container may include a porous filter located at the second end of the chamber. The sample container may include an integral stirrer located within the chamber.
Abstract:
A milk analyser comprising a milk analysis unit having an analysis modality wherein the milk analysis unit further comprises a milk classification system having an imaging device configured to image milk for generation of digital image data; a processor of a computing device which is adapted to execute a program code to implement a deep learning neural network classifier trained using labelled milk images from milk within the classes into which the imaged milk may be classified and operable to generate a classification of the imaged milk; and a controller configured to output a control signal in dependence of the generated classification to control a sample intake to regulate the supply of milk to the analysis unit.
Abstract:
A sample test cassette includes an inlet configured to introduce a sample liquid into the sample test cassette; an elongate channel configured to receive an elongate lateral flow test strip and configured with a first end that is configured to be in liquid communication with the inlet; and a mechanical transport system that is an integral part of the sample test cassette and is configured to generate a flow of the sample liquid from outside of the inlet and towards the first end of the elongate channel.
Abstract:
A hydrodynamic focusing device comprises first and second flow channels; a wall at least partially defining an envelopment region connected in-line between the first and second flow channels which collectively define a flow direction extending therethrough; and a chimney comprising a body and a sample fluid inlet, extending from the wall and into the envelopment region. The sample fluid inlet faces at least partially perpendicular to the flow direction in the envelopment region, such that the sample fluid inlet is configured to supply a sample fluid into the envelopment region in a direction that is at least partially perpendicular to the flow direction. The body and the sample fluid inlet each have an elongate profile which has a rounded leading edge facing the first flow channel and opposing long edges connecting the leading and trailing edges and tapered towards the trailing edge.