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| Determination of heavy metals in fly ash of waste incineration by Inductively Coupled Plasma Mass Spectrometry |
| Received:February 26, 2019 Revised:March 07, 2019 |
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| DOI：doi:10.3969/j.issn.2095-1035.2019.05.003 |
| KeyWord:fully automatic digestion; ICP-MS; waste incineration; fly ash; heavy metal |
| Author | Institution |
| zhanggengyu |
吉林市环境监测站 |
| xinghui |
杭州萧山锦江绿色能源有限公司 |
| WU Chao |
吉林市环境监测站 |
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| Abstract: |
| To understand the contents of metal elements in fly ash, the new method which comprised the automatic digestion system optimization program, and the efficient mixed acid digestion system(HNO3+HF+HClO4) was established to measure the 9 elements in fly ash samples. Through selecting suitable isotopes and calibrating equation of interference elements to correct the mass spectrometry interference, the chip technology and collision mode were used to eliminate matrix interference, and the single internal standard 103Rh was used to correct signal drift. ICP-MS arose highly representation on beryllium, vanadium, chromium, manganese, nickel, copper, zinc, cadmium and lead elements analysis. The calibration curve r>0.999, the detection limit of the method between 0.01~0.30 μg/g. The method was validated by SRM1633C, average RSD was between 0.54%~2.38%, and the recovery rate was 85%~120%, the measured values of each element were in agreement with the standard values. The method is suitable for the determination of total metals in fly ash samples from waste incineration with its good accuracy and precision. |
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