C, S, O, N, H-Analysis

Description of method

For the determination of C and S, the sample is burned in flowing oxygen by radiofrequency heating after the addition of combustion aids and, if necessary, substances making it electrically conductive. The reaction products CO - after conversion into CO₂- and SO₂ are determined via their infrared absorption.

For the analysis of O, N and H, the samples are heated in flowing helium gas in a graphite crucible by means of resistance heating. O is determined as CO₂, H is determined as H₂O by infrared absorption, N₂ by thermal conductivity detection.

Features of C, S, O, N, H analysis

• The methods are suitable for the rapid determination of C and S or N, O and H in metals, minerals, rock and ceramic materials
• Analysis times of generally a few minutes per sample
• High accuracy and reproducibility of the analysis results using calibration standards (RSD: 1-3%)
• The instrumental detection limit is 0.5 µg g^-1

Sample preparation

As a rule, no sample preparation is necessary.

• Crushing, degreasing, pickling, where required

Instrumental equipment

• Leco CS 600 carbon/sulphur determinator
• Leco TCH 600 nitrogen/oxygen/hydrogen determinator

Analysis examples

Steels, nonferrous metals, Ni-base alloys, ODS alloys, ores, rock, soils, superconductors, ceramic materials, shale oil, kerogen concentrates, perovskites

Contact

Herr Dr. V. Nischwitz Tel.: 02461-61 1673