Verbesserung der Chrombestimmung in Königswasseraufschlüssen von Bodenproben mit der Atomabsorptions-Spektroskopie (Flammen-Technik) |
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| Authors: | Dieter Ngele Willi Brunn |
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| Institution: | Dieter Nägele,Willi Brunn |
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| Abstract: | The improvement of Chromium determination in soil extracts by means of atomic absorption spectroscopy (flame technique) In order to achieve an improvement in the determination of chromium in soil extracts by means of atomic absorption spectroscopy, the influence of elements (Hg, Cd, Pb, Cu, Ni, Zn, Fe, Al, Mg, K, Na, Ca, P) which could possibly disturb the measurements of the chromium absorption using different flames (air/acetylene and laughing gas/acetylene), flame characteristics and measuring wavelengths (357,9 nm and 359,4 nm) was investigated. In this connection disturbances occurred which both raised or lowered the signal level. For nearly interference-free determination of chromium in the field of soil analysis we recommend the measuring wavelength 359,4 nm and the blue air/acetylene flame which has a low fuel gas content or the laughing gas/acetylene flame (approx. 5 cm high inner reduction zone). |
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