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| Content analysis and dietary risk assessment of heavy metals in Houttuynia cordata from Guizhou Province |
| Received:July 22, 2022 Revised:August 01, 2022 |
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| DOI：doi:10.3969/j.issn.2095-1035.2023.05.004 |
| KeyWord:inductively coupled plasma mass spectrometry (ICP-MS); Guizhou; Houttuynia cordata; heavy metals; dietary risk assessment |
| Author | Institution |
| LIU Wen-zheng |
贵州省疾病预防控制中心 |
| LIU Li-ya |
贵州省疾病预防控制中心 |
| ZHOU Yi-bing |
贵州省疾病预防控制中心 |
| WU Yu-tian |
贵州省疾病预防控制中心 |
| YIN Zhong |
贵州省疾病预防控制中心 |
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| Abstract: |
| In order to study the content levels and their dietary health risk levels of four heavy metals including lead, cadmium, chromium, and arsenic in Houttuynia cordata from Guizhou Province. Taking the commercially available Houttuynia cordata from 9 cities of Guizhou as the research object, the samples were digested by microwave digestion instrument, the content of 4 kinds of heavy metals in the samples were determined simultaneously by inductively coupled plasma mass spectrometry (ICP-MS), the pollution degree of heavy metals were evaluated by single factor pollution index method and Nemerow comprehensive pollution index method, the dietary risk of 4 kinds of heavy metals were evaluated by target hazard quotient/total target hazard quotient (THQ/TTHQ). The results were as follows: the content of Pb in Houttuynia cordata was 0.084-0.12 mg/kg, the content of Cd was 0.041-0.068 mg/kg, the content of Cr was 0.076-0.43 mg/kg, and the content of As was 0.074-0.14 mg/kg. The pollution index of Pb in TR, QDN and ZY were all greater than 1, and the single pollution index of Cd, Cr and As of Houttuynia cordata from 9 cities of Guizhou were all less than 1. The order of Nemero comprehensive pollution index of Houttuynia cordata from different cities is 1>TR>QDN>ZY>AS>GY>BJ>QXN> 0.7≥QN>LPS. The dietary health risk index THQ of a single heavy metal was generally Cd>Pb>As>Cr, and all were less than 1. The composite health risk index of the four heavy metals after consuming Houttuynia cordata from 9 cities of Guizhou for adults or children were all in the order of TR>QDN>ZY>AS>GY>BJ>QXN>QN>LPS, and all were less than 1. The Houttuynia cordata commercially available in TR, QDN and ZY in Guizhou have been contaminated with Pb. The heavy metal pollution levels of the commercially available Houttuynia cordata of TR, QDN, ZY, AS, GY, BJ and QXN were all at the warning level, and the heavy metal pollution levels of the commercially available Houttuynia cordata of QN and LPS were all safe levels. After adults or children consumed Houttuynia cordata from 9 cities of Guizhou, the dietary health risks of a single heavy metal were not obvious. The health risk levels of the complex diet caused by the 4 heavy metals were all lower. Overall, the dietary health risk of Houttuynia cordata from Guizhou produced and commercially available for adults or children is low and at a safe level. |
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