摘要:
A method for the wavelength calibration of echelle spectra, in which the wavelengths are distributed across number of orders is characterised by the steps: recording of a line-rich reference spectrum with known wavelengths for a number of the lines, determination of the position of a number of peaks of the reference spectrum in the recorded spectrum, selection of at least two first lines of known order, position and wavelength, determination of a wavelength scale for the order in which the known lines lie, by means of a fit function ηm (x), determination of a provisional wavelength scale ηm 1(x) for at least one neighbouring order m 1, by means of addition/subtraction of a wavelength difference η¿FSR? which corresponds to a free spectral region, according to ηm 1(x) = ηm (x) ηFSR with η¿FSR=η¿m?(x)/m, determination of the wavelengths of lines in said neighbouring order m 1, by means of the provisional wavelength scale η 1(x), replacement of the provisional wavelength of at least two lines by the reference wavelength for said lines as obtained in step (a) and repeat of steps (d) to (g) for at least one further neighbouring order.
摘要:
The invention relates to a spectrometer assembly (10) containing: a radiation source (11) with a continuous spectrum; a pre-monochromator (2) for generating a spectrum with relatively little linear dispersion, from which a spectral segment can be selected, whose spectral bandwidth is less than or equal to the bandwidth of the free spectral range of the order in the echelle spectrum, for which the mean wavelength of the selected spectral segment can be measured with a maximum blaze efficiency; an echelle spectrometer (4) comprising means for wavelength calibration; an entry slit (21) on the pre-monochromator (2) and an intermediate slit assembly (3) comprising an intermediate slit and a local resolution radiation receiver (5) on the exit plane of the spectrometer for detecting wavelength spectra. The assembly is characterised in that the width of the intermediate slit (3) is greater than the monochromatic image of the entry slit generated by the pre-monochromator at the location of the intermediate slit and that means are provided for calibrating the pre-monochromator, by means of which the radiation that is reproduced in the detector of the radiation source with a continuous spectrum can be calibrated to a reference position.
摘要:
The invention relates to the production and the design of flow-through elements for microstructured analytical systems. The inventive method allows the production of analytical systems from synthetic material that are provided with a liquid- and gas-tight channel structure in which thin-film electrodes may be arranged any place.
摘要:
The invention relates to a device (10) for identifying concentrations of elements in samples. Said device comprises a continuous radiation source (14), a high-resolution spectrometer (28), an imaging optical system (16, 22, 26) which images the radiation of the radiation source (14) onto the entrance gap (52) of the spectrometer (28), and a detector (32) in the exit gap plane of the spectrometer (28). Said detector is provided with a plurality of detector elements which are used to scan a spectral range in which at least one spectral line of at least one element to be identified lies, said scanned range also including a surrounding area of said spectral line. The device (10) is further characterized in that the imaging optical system (16, 22, 26) generates at least three real images of the radiation source (14), that a sample compartment (34) is provided at the site of a first real image (18) and a sample compartment (36) at the site of an additional real image (24). The atomization device may be a graphite tube (36) or a flame (34) and emission can be induced by ICP torch. The spectrometer (28) is an echelle spectrometer.
摘要:
The invention relates to a device for introducing samples which is used for miniaturized analytical systems. Defined volumina of 0.01 νl up to 100 νl can be introduced due to a specific design of the channel system and the displacement of the liquid volume of a defined channel section. The inventive device is especially useful for a subsequent analysis of the samples by means of isotachophoresis.