CAJ | 학술논문

建立了茶汤中两种不同溶解度农药噻虫嗪和高效氯氟氰菊酯残留分析方法，并利用该方法研究了浸泡时间、温度、次数、茶叶形状和茶叶中残留量对两种农药浸出规律的影响。结果表明：恒定水温100℃时，浸泡不同时间，15 min时，整叶茶和碎茶中噻虫嗪浸出率达最大值分别为81.2%和88.6%；25 min时碎茶中高效氯氟氰菊酯的浸出率达到最大为5.5%，此时整叶茶中为0.41%。不同水温下冲泡15 min时，噻虫嗪和高效氯氟氰菊酯在茶汤中的浸出率均随着浸泡温度的升高而增加，当水温100℃时，整叶茶和碎茶中噻虫嗪的浸出率达到最大，分别为83.9%和89.1%；高效氯氟氰菊酯的浸出率也达到最大，分别为0.55%和4.1%。恒定水温100℃，冲泡15 min 3次，整叶茶实际样品中噻虫嗪和高效氯氟氰菊酯的浸出率随浸泡次数增加而逐次减小，总浸出率最大分别为93.25%和1.94%。茶汤中噻虫嗪总浸出浓度与它在成茶中的残留量呈线性关系 Y=0.9267X-0.0336，R2=0.9954；高效氯氟氰菊酯总浸出浓度与它在成茶中的残留量呈二次函数关系 Y=0.0026X2-0.0023X＋0.0096，R2=0.9765。在此基础上对茶叶中噻虫嗪和高效氯氟氰菊酯残留量进行风险评估，结果表明饮茶摄入两种农药残留对人体健康影响的风险很小。
건립료다탕중량충불동용해도농약새충진화고효록불청국지잔류분석방법，병이용해방법연구료침포시간、온도、차수、다협형상화다협중잔류량대량충농약침출규률적영향。결과표명：항정수온100℃시，침포불동시간，15 min시，정협다화쇄다중새충진침출솔체최대치분별위81.2%화88.6%；25 min시쇄다중고효록불청국지적침출솔체도최대위5.5%，차시정협다중위0.41%。불동수온하충포15 min시，새충진화고효록불청국지재다탕중적침출솔균수착침포온도적승고이증가，당수온100℃시，정협다화쇄다중새충진적침출솔체도최대，분별위83.9%화89.1%；고효록불청국지적침출솔야체도최대，분별위0.55%화4.1%。항정수온100℃，충포15 min 3차，정협다실제양품중새충진화고효록불청국지적침출솔수침포차수증가이축차감소，총침출솔최대분별위93.25%화1.94%。다탕중새충진총침출농도여타재성다중적잔류량정선성관계 Y=0.9267X-0.0336，R2=0.9954；고효록불청국지총침출농도여타재성다중적잔류량정이차함수관계 Y=0.0026X2-0.0023X＋0.0096，R2=0.9765。재차기출상대다협중새충진화고효록불청국지잔류량진행풍험평고，결과표명음다섭입량충농약잔류대인체건강영향적풍험흔소。
A residue analysis method for thiamethoxam and lambda-cyhalothrin in tea infusion was established, and the influence of brewing time, brewing temperature, tea shape and residue concentration in made tea to the brewing behavior from made tea to tea infusion were investigated by this method. The results showed that: when constant temperature of 100℃ for different brewing time (5~30 min), the brewing rate of thiamethoxam were maximum at 15 min, which were 81.2% in whole leaf tea and 88.6% in broken tea, the brewing rate of lambda-cyhalothrin reached the maximum of 5.5% at 25 min in broken tea, and the whole leaf tea for 0.41%; after brewing in different temperature for 15 min, the brewing rates of thiamethoxam and lambda-cyhalothrin were increased according to the brewing temperature, when the temperature was 100℃, in the whole leaf tea and in the broken tea, the brewing rates of thiamethoxam were the maximum at 83.9%and 89.1%, respectively;and for lambda-cyhalothrin were the maximum at 0.55% and 4.1%, respectively. When constant temperature at 100℃, after brewing 15 min for three times, the brewing rates of two pesticides were decreased with the brewing times, and the total maximum brewing rates of thiamethoxam and lambda-cyhalothrin were at 93.25% and 1.94%, respectively. The extracting concentration of thiamethoxam in tea infusion from made tea were meeting the linear relationship, the equation was Y=0.9267X-0.0336, R2=0.9945, and the concentration of lambda-cyhalothrin in tea infusion extracting from made tea were meeting the quadratic function relationship, the equation was Y=0.0026X2-0.0023X+0.0096, R2=0.9765. On the basis of research, the risk assessment on thiamethoxam and lambda-cyhalothrin in tea during drinking showed that the risk to human health via tea drinking was very small.