FI72610C - MED EN VAETSKEDOSERARE FOERSEDD MAETNINGSANORDNING. - Google Patents

Description

72 61 0

Measuring equipment with liquid dispenser

The invention relates to an apparatus for measuring the radiation properties of separate liquid samples, such as a photometer, a spectral photometer, a fluorometer, a luminometer, a turbido-5 meter, a nepheloneter, a cell counter or an isotope counter.

Analytical equipment, e.g. photometers, with a cuvette for samples and a movable probe for receiving or introducing radiation into the sample is already known. There are also equipments with a li-10 scissor liquid dispenser that can be used to introduce a sample or reset into cuvettes. Such a device is necessary, for example, when the measurement must be carried out immediately after the addition of the reagent.

An analytical apparatus according to claim 1 has now been invented, comprising a cuvette, a liquid dispenser and a movable probe, and in which the liquid dispenser is attached to the probe. In addition, according to one embodiment, the cuvette may be horizontally movable.

The device according to the invention does not have the advantage that no separate movable member is required for dispensing liquids. In addition, the equipment can measure the sample with an even smaller delay immediately before and after the addition of the reagent, which significantly increases the use of the equipment.

25 The use of a mobile cuvette system further increases the flexibility of the equipment.

An embodiment of the invention will be illustrated in more detail by means of the accompanying figure.

The light is introduced into the probe from the light source along the fiber bundle 1 30. By means of the rising lens 2, the light beam emanating from the sight 3 of the fiber bundle is adapted to pass through the sample 5 in the cuvette system 3, after which the light beam hits the light detector 6. The passage of the house is indicated by broken lines in Fig. 2. The signal from the photodetector is processed in an electrical circuit and any necessary computational operations are performed, e.g., by a computer. In the figure, the light detector and the tip of the liquid dispenser are not in the same place, so the measuring head must be moved slightly between the dosing to the specific cuvette and the measurement. This need for transfer can be avoided, for example, by bending the tip of the liquid dispenser under the light detector. The light source, the light detector and the tip of the liquid dispenser are mounted on the measuring fork so that they remain in a fixed position relative to each other as the measuring fork moves. The movement of the measuring fork takes place perpendicular to the trajectory of the cuvette, so that by moving a certain distance both, any cuvette can be subjected to the measurement.

'15 If the device is used to measure absorption, the most preferred method of measurement is the so-called vertical measurement method. In this case, the light source is most preferably located below the cuvette.

Claims (2)

3 '' '.....' 7261 O A measuring apparatus with a liquid dispenser, with a cuvette (4) for liquid samples consisting of open measuring vessels at the upper end, a measuring probe with a radiation detector 5 (6) movable from one measuring vessel to another to measure the radiation properties of each sample, and that the tip (8) of the liquid dispenser is attached to the 10 measuring heads. Apparatus according to Claim 1, characterized in that the cuvette is movable horizontally.