Method for continuously measuring easily oxidized organic carbon and inert organic carbon in soil

The invention discloses a method for continuously measuring easily oxidized organic carbon and inert organic carbon in soil, which comprises the following steps: step 1, weighing a soil sample in a centrifuge tube, adding a potassium permanganate solution, oscillating and centrifuging the centrifuge...

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Hauptverfasser: HU YAOHUA, HE XIUHUI, LAN MINGGUO, DING ZHI, GUO JIAZE, DUAN WEN
Format: Patent
Sprache:chi ; eng
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Beschreibung
Zusammenfassung:The invention discloses a method for continuously measuring easily oxidized organic carbon and inert organic carbon in soil, which comprises the following steps: step 1, weighing a soil sample in a centrifuge tube, adding a potassium permanganate solution, oscillating and centrifuging the centrifuge tube, diluting the centrifuged clear liquid with high-purity water, measuring the absorbance value of the diluted sample, and calculating the absorbance value of the diluted sample; calculating the content of easily oxidized carbon in the soil according to the consumed potassium permanganate amount, and adding blank control; and 2, cleaning and filtering the soil residue sample in the step 1, transferring into a colorimetric tube, adding a potassium dichromate standard solution and concentrated sulfuric acid, uniformly shaking, putting into an oil bath pan, transferring into a conical flask, titrating with ferrous sulfate until the end point of brownish red by taking phenanthroline as an indicator, and calculating