Process and device of elemental analysis
AssigneeThermoquest Italia S.p.A.
InventorsLUIGI RAGAGLIA, GIACINTO ZILIOLI, FRANCA ANDREOLINI, LILIANA NOEMI KROTZ
Life of this patent
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Abstract
Elemental analysis of a sample is carried out in an oxygen atmosphere in a combustion reactor and the volume of oxygen required for analysis is determined by means of the algorithm Qo=Δ(Qc) (1) where Qo is the volume of oxygen required and Qc is the weight of the sample to be analyzed and Δ=Qo1/Qc1 where Qo1 is the volume of oxygen necessary for the combustion of a predetermined quantity Qc1 of the sample to be analyzed, the volume of oxygen Qo is then fed in pulsed mode to the combustion reactor, by means of a flow detector.
Claims10
A process for elemental analysis by means of flash combustion in an oxygen atmosphere in a combustion reactor, characterized by comprising the following steps:
- determining the volume of oxygen required for analysis as a function of the sample to be analyzed by means of the following algorithm
- Qo=Δ(Qc) [1]
- where:
- Qo is the volume of oxygen required, Qc is the weight of the sample to be analyzed and Δ=Q01Qc1
- where Qo1 is the volume of oxygen required for the combustion of predetermined quantity Qc1 of the sample to be analyzed, said Δ being a characteristic value of the type of samples to be analyzed, and
- feeding in pulsed mode the said volume of oxygen Qo to said combustion reactor, from a source of oxygen, by means of a flow regulator.
A process according to any previous claim, in which a flow of inert carrier is fed to the analysis device before and after the pulsed oxygen introduction step, wherein a flow of said carrier is fed to a reference branch of the said device.
A device for flash elemental analysis comprising:
- a combustion reactor, means for supplying a flow of inert carrier to the device, a source of oxygen a feed line and means for pulse-feeding oxygen to said reactor, a flow regulator on said feed line of oxygen, and means of determining the volume of oxygen required for analysis of the sample by means of the following algorithm
- Qo=Δ(Qc) [1]
- where Qo is the volume of oxygen required, Oc is the weight of the sample to be analyzed and Δ=Qo1/Qc1, and where Qo1 is the volume, known and measured, of oxygen necessary for the combustion of known quantity Oc1 of the sample to be analyzed.
Dependencies are inferred from the claim text.