Spectroscopic analysis
US6236457A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 6, 1998 |
| Grant date | May 22, 2001 |
| Priority date | — |
| Expiry date | Nov 6, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/3148
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Spectroscopic apparatus for sequentially detecting the presence of a plurality of elements in a sample. The apparatus includes a plurality of lamps (1a-1e) each of which is for detecting the presence of a respective at least one predetermined element in a plurality of elements. A beam selector (13) which may be a mirror, is operative to direct a beam of light (7) from any one of lamps (1a-1e) to an analysis zone (8). The apparatus includes a monochromator (15), the drive (24) of which is under the control of a controller (25) with a memory device (26) linked thereto. Predetermined settings for the monochromator corresponding to the peak settings for each wavelength of interest can be stored in memory (26) for subsequently driving the monochromator to those settings without the need to undertake a peaking routine for each elemental analysis, thereby saving analyses time. The lamp and beam selector arrangement of the apparatus substantially reduces the time required to change from one lamp to another thereby facilitating sequential spectroscopic multi-element analyses of samples. Apparatus which uses a flame for atomising a sample includes valves (19 and 20) for controlling the flow …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.