| Determination of Heavy Metal Element Contents in Carbon Black by Microwave Digestion-IPS-OES |
| Received:February 04, 2021 Revised:February 04, 2021 |
| DOI：10.12136/j.issn.1000-890X.2022.02.0144 |
| Key Words: microwave digestion-ICP-OES；carbon black；heavy metal element；content |
| Author Name | Affiliation | E-mail | | DING Zhaojuan* | Stone Laboratory Co.，Ltd | dingzj@stonelab.com.cn | | LIU Xuejiao | Stone Laboratory Co.，Ltd | | | ZHANG Yanling | Stone Laboratory Co.，Ltd | | | WU Aiqin | Stone Laboratory Co.，Ltd | |
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| Abstract: |
| Abstract：The contents of heavy metal elements（Pb，Cd，Cr and Hg） in carbon black were determined
by microwave digestion-inductively coupled plasma optical emission spectrometry（microwave digestion-
ICP-OES）. By optimizing the digestion solvent，temperature program，temperature control method and
temperature holding time，and selecting the analytical spectral line of each element，a method for the
determination of the contents of Pb，Cd，Cr and Hg in carbon black by microwave digestion-ICP-OES was
established. The results showed that，the detection limit of each element was 2. 0 mg·kg-1 for Pb and Cd，
3. 1 mg·kg-1 for Cr and 1. 6 mg·kg-1 for Hg. The standard recovery rate of each element was in the range
of 89%～103%. The relative standard deviation of the test results of each element content was in the range of
1. 03%～3. 78%. This method was simple and accurate，and met the requirements of the relevant regulations. |
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