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Soil digestion method between Microwave Digestion and AUWII Digestor
Source: | Author:AUWII | Time:2020-12-31 | 365 Access | Share:
Weigh 0.2g (precisely 0.1mg) sample into a 50ml PTFE digestion tube, add 5ml hydrochloric acid, heat digestion at 150℃ for 30min on a graphite digestion instrument in a fume hood, add 5ml nitric acid, continue heating digestion at 150℃ for 30min , Add 4ml of hydrofluoric acid, continue heating at 150°C for 30min, then increase the temperature to 170°C, cover and digest for 120min, and finally add 1ml perchloric acid, open the lid and heat at 170°C for 60min.
Soil digestion method:
Weigh 0.2g (precisely 0.1mg) sample into a 50ml PTFE digestion tube, add 5ml hydrochloric acid, heat digestion at 150℃ for 30min on a graphite digestion instrument in a fume hood, add 5ml nitric acid, continue heating digestion at 150℃ for 30min , Add 4ml of hydrofluoric acid, continue heating at 150°C for 30min, then increase the temperature to 170°C, cover and digest for 120min, and finally add 1ml perchloric acid, open the lid and heat at 170°C for 60min.
AUWII digestor: The entire process of digestion and acid removal takes only 4.5 hours
Microwave digestion: digestion for 50 minutes, cooling to room temperature for 60 minutes, and acid removal for 180 minutes, 4.8 hours;