Eppendorf Ag

Eppendorf-netheler-hinz Gmbh

Rainer Treptow

Kurt Harnack

Wolfgang Goemann-Thoss

Andreas Schirr

Gerd Joachim Eckert

Jan Kraack

Rainer Schliesser

Norbert Wittschief

Reiner Spolaczyk

Andreas Maass

A method for the quantitative real time analysis of fluorescent samples is provided, at which each of the samples is excited to fluoresce by a sample individual light source () and the intensity of the light which is emitted by the samples is measured. For a highly precise measurement of even low light intensities for the purpose of reduction of the analysis time, each light source () is switched on and off-during a defined interval by a clocked pulse sequence of constant pulse frequency alternately. The measurement of the intensity of the emission light during these intervals is exclusively performed during the switch-on phases of the light, source ().

Method and device for the quantitative real time analysis of fluorescent samples

The invention relates to a method for photometrically investigating sample radiations of at least one sample, which are caused by the radiation of N emitter elements of at least one radiation element wherein said N emitter elements are emitting radiation during time periods which at least partially overlap, to detect the sample radiation of at least two samples as a sum signal during time periods which at least partially overlap and to evaluate the sample radiation of at least one individual sample from said sum signal.

Device and method for radiometric measurement of a plurality of samples

A method for tempering at least one sample wherein an plastic-based electrically conductive material of a specimen carrier consisting at least partially of this material for at least one specimen is applied to by an electric current/an electric voltage which causes a resistance heating of at least one portion of the plastic-based electrically conductive material, which resistance heating heats a specimen disposed on the specimen carrier.

Method and apparatus for tempering specimens

A device for photometric measurement of several samples () that are exposed to radiation from a light source () associated therewith. The light modified by the samples () is intercepted by an optical device () and is guided as a sum of all the light radiated from all samples () to at least one sensor () for measuring the intensity and evaluation thereof in an evaluation device () arranged downstream. The light sources () are controlled individually by a control device () and the evaluation device () and the control device () are controlled such that the evaluation device () separates the light from each sample () from the light of the other samples. The control device () modulates the light source () with various signals, which are pre-assigned to the evaluation device () and used to determine the light signals of the individual samples () from the sum signal received by the sensor ().

Device for photometric measurement of several samples

A cuvette for the measurement of the absorption of irradiation in liquid samples which at least in the regions of the windows is of a transparent plastic with an inner space which is formed in an essentially box-shaped upper part with an upper opening for filling and removing sample fluid and in an essentially box-shaped lower part which projects downwards from the floor of the upper part and which comprises a smaller cross section than the upper part, of maximally 200 &mgr;l content capacity, two pairs of planar-parallel windows in the lower part which lie opposite one another, wherein the distance a of the one pair is different to the distance b of the windows of the other pair in order to make available differing layer thickness of the sample fluid for the measurement and with four feet which are flush with the four corners of the upper part and which extend away from the upper part at least until up to the level of a floor of the lower part.

Cuvette

Hand apparatus for pipetting and photometrically evaluating samples which comprise a pipetting means, an integrated photometer and a replaceable pipette tip connected to said pipetting means, said pipette tip being defined as a cell and provided within the optical path of the photometer for photometrically evaluating absorbed samples.

Growing community of inventors

Norderstedt, Germany

Rainer Treptow