福鼎白茶农残检测及紫外照射对吡虫啉和呋虫胺的降解效果  

Detection of pesticide residues in Fuding white tea and degradation of imidacloprid and dinotefuran using ultraviolet irradiation

作　　者：李元朝 张树青 张一言 周利[4] 傅燕青 郑伟煌 林喜盈 陶丽明 孙威江[1,2] 金珊 LI Yuanchao;ZHANG Shuqing;ZHANG Yiyan;ZHOU Li;FU Yanqing;ZHENG Weihuang;LIN Xiying;TAO Liming;SUN Weijiang;JIN Shan(College of Horticulture,Fujian Agriculture and Forestry University/Key Laboratory of Tea Science at Universities,Fuzhou 350002,China;China White Tea Research Institute,Fuding 355200,China;Fuding Tea Industry Development Center,Fuding 355200,China;Tea Research Institute of Chinese Academy of Agricultural Sciences,Hangzhou 310000,China)

机构地区：[1]福建农林大学园艺学院/茶学福建省高校重点实验室,福州350002 [2]中国白茶研究院,福鼎355200 [3]福鼎市茶产业发展中心,福鼎355200 [4]中国农业科学院茶叶研究所,杭州310000

出　　处：《应用与环境生物学报》2025年第2期233-246,共14页Chinese Journal of Applied and Environmental Biology

基　　金：中国白茶研究院开放课题(BCY2021K03);福建农林大学寿宁乡村振兴研究院高山茶产业技术服务项目(2023-02);福建张天福茶叶发展基金会科技创新基金(FJZTF01)资助。

摘　　要：为调查福鼎白茶质量安全情况、助推白茶产业持续稳定发展,以福鼎市白牡丹、寿眉、贡眉为材料,采用超高液相色谱-质谱联用技术(UPLC-MS/MS),对样品65项农残含量进行检测.结果显示,白牡丹样品检出农残种类6项,贡眉和寿眉样品均检出农残13项,其中,寿眉样品吡虫啉含量为1.690 mg/kg,超出中国农药残留最大限量(MRL)3倍.通过不同波长和功率的紫外照射处理,对寿眉中吡虫啉和呋虫胺农残降解效果进行研究,得出紫外照射功率为32 W,波长为中波(UVB)时对呋虫胺和吡虫啉的降解效果显著,分别降解了67%和65%,为最佳的处理组合.同时发现经紫外照射处理后的寿眉与未经处理样品相比,香气不变,汤色变浅,滋味更醇和.而储存3个月后经紫外照射处理的寿眉样品香气、汤色与滋味变化又与未经处理的样品趋同,紫外照射样品呈现储存后品质恢复的现象.本研究表明紫外照射处理对白茶干茶农残降解具有可行性,不同波长和功率的紫外照射对茶叶农残的降解效果存在差异,结果可为提升我国茶叶质量安全提供一种科学方法和理论参考.(图5表4参54)To investigate the quality and safety of Fuding white tea and promote the sustainable and stable development of the white tea industry,pesticide residues in Fuding white tea processed from Baimudan,Shoumei,and Gongmei were analyzed.This study aimed to evaluate the degradation effect of ultraviolet(UV)irradiation on pesticide residues.In this experiment,ultra-high-performance liquid chromatographymass spectrometry was used to detect the content of 65 pesticide residues in the samples.Simultaneously,tea samples containing pesticide residues were irradiated using combinations of UV irradiation powers(8,16,and 32 W)and wavelengths(256,313,and 365 nm).The results showed that six pesticide residues were detected in Baimudan sample,while 13 pesticide residues were found in both Gongmei and Shoumei samples.The imidacloprid content in the Shoumei sample was 1.690 mg/kg,which was three times higher than the maximum residue limit in China.The degradation effect of imidacloprid and dinotefuran residues in Shoumei were further studied under UV irradiation at different wavelengths and powers.Imidacloprid and dinotefuran residues were signiffcantly degraded when the UV irradiation power was 32 W and the wavelength was in the medium-wave (UVB) range. The degradation rates were 67% and 65%, respectively, representing the optimal treatment combination. Sensory evaluation results showed that, compared with untreated samples, the UVirradiated Shoumei exhibited an unchanged aroma, lighter soup color, and a more mellow taste. However, after three months of storage, the aroma, soup color, and taste of the UV-treated Shoumei became similar to those of the untreated sample, showing a phenomenon of quality recovery. The results demonstrated the differences in the degradation effects of different wavelengths and powers of UV irradiation on pesticide residues in tea. UV irradiation treatment is feasible for degrading pesticide residues in dried white tea. This study provides a scientiffc approach and theoretical reference for improving the

关 键 词：福鼎白茶 吡虫啉 呋虫胺 紫外照射 农残降解 

分 类 号：TS272.7[农业科学—茶叶生产加工]