|
| Study on Dissolution Characteristics of Heavy Metals and Trace Elements in Chrysanthemum Tea |
| Received:October 12, 2023 Revised:February 20, 2024 |
| View Full Text View/Add Comment Download reader |
| DOI：10.3969/j.issn.2095-1035.2024.07.017 |
| KeyWord:Huangju; Jinsi Huangju; Heavy metals; Trace elements; Dissolution characteristic |
| Author | Institution |
| TANG Ning |
浙江省农业科学院农产品质量安全与营养研究所 |
| YANG Yonggui |
浙江省农业科学院农产品质量安全与营养研究所 |
| XIONG Jiacheng |
浙江省农业科学院农产品质量安全与营养研究所 |
| GAO Na |
浙江省农业科学院农产品质量安全与营养研究所 |
| HU Jing |
浙江省农业科学院农产品质量安全与营养研究所 |
| ZHAO Shouping |
浙江省农业科学院农产品质量安全与营养研究所 |
| YE Xuezhu |
浙江省农业科学院农产品质量安全与营养研究所 |
|
| Hits: 172 |
| Download times: 165 |
| Abstract: |
| In order to investigate the content of heavy metals and trace elements in chrysanthemum tea and tea soup, and guide the drinking of chrysanthemum tea, this article analyzed the content and dissolution characteristics of heavy metals and trace elements in the main chrysanthemum tea varieties Huangju and Jinsi Huangju in Zhejiang. The content of seven heavy metals, Cd, Cr, Cu, Pb, Zn, Ni, As, and seven trace elements, K, Na, Ca, Mg, Se, Fe, and Mn, were determined by ICP-MS and ICP-OES. The dissolution characteristics of heavy metals and trace elements in Huangju and Jinsi Huangju under different soaking times and conditions were studied by referring to traditional tea brewing methods. The results showed that the Cd content in both types of chrysanthemums exceeded the standard, but the Cd in tea soup and other heavy metals met the standard for drinking water. As the soaking time prolonged, the dissolution rates of heavy metals and trace elements in chrysanthemums gradually increased, with a total dissolution rate of only 9.9% -11.8% for Cd, and a total dissolution rate of Cr and Pb below 10%. However, the dissolution rates of Cu, Zn, Ni, As were relatively high, ranging from 45.0% -71.6%, and the dissolution rates of trace elements were between 1.7% -84.0%, among which K, Na The dissolution rate of Se element is relatively high, with the highest reaching 84.0%, 72.9%, and 78.0%, respectively; As the soaking times increase, the dissolution rates of heavy metals and trace elements in chrysanthemums gradually decrease. After the first soaking, the dissolution rates of Cd, Cr, and Pb in chrysanthemums are relatively low, ranging from 0.3% to 8.0%, respectively. The initial dissolution rates of Cd, Cr, and Pb account for 50% to 100% of the total dissolution rate. Cu, Zn, Ni, and As account for 28% to 63% of the total dissolution rate after the first soaking. After the first soaking, the dissolution rates of K and Se in chrysanthemums are relatively high, reaching 30.6% to 65.8%, while Na, Ca, Mg The dissolution rate of Mn ranges from 5.8% to 29.4%. The first soaking dissolution of trace elements accounts for 41% -100% of the total dissolution. Among the two types of chrysanthemums, the proportion of heavy metals and trace elements released by the first soaking of golden chrysanthemum is relatively high. By extending the soaking time, the dissolution of heavy metals and trace elements in tea soup can be increased. By discarding the initial soaking water, although more than half of the heavy metals are removed, a large amount of trace elements are also lost. It is recommended to extend the soaking time when brewing tea.. |
| Close |
|
|
|