Dissipation behavior of octachlorodipropyl ether residues during tea planting and brewing process

Liao, Min; Shi, Yanhong; Cao, Haiqun; Hua, Rimao; Tang, Feng; Wu, Xiangwei; Tang, Jun

doi:10.1007/s10661-016-5573-z

Cited by 11 publications

(6 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Several factors, including environmental factors (light, moisture, and pH), the crop characteristics, and physical and chemical properties of the pesticide (water solubility and volatility), have played a fundamental role in affecting pesticide persistence in crops [ 12 ]. A. polytricha was mainly cultivated in greenhouse.…”

Section: Resultsmentioning

confidence: 99%

Dissipation and Migration of Pyrethroids in Auricularia polytricha Mont. from Cultivation to Postharvest Processing and Dietary Risk

Xiao

Duan

et al. 2018

Molecules

Self Cite

View full text Add to dashboard Cite

In order to ensure raw consumption safety the dissipation behavior, migration, postharvest processing, and dietary risk assessment of five pyrethroids in mushroom (Auricularia polytricha Mont.) cultivated under Chinese greenhouse-field conditions. Half-lives (t1/2) of pyrethroids in fruiting body and substrate samples were 3.10–5.26 and 17.46–40.06 d, respectively. Fenpropathrin dissipated rapidly in fruiting bodies (t1/2 3.10 d); bifenthrin had the longest t1/2. At harvest, pyrethroid residues in A. polytricha (except fenpropathrin) were above the respective maximum residue limits (MRLs). Some migration of lambda-cyhalothrin was observed in the substrate-fruit body system. In postharvest-processing, sun-drying and soaking reduced pyrethroid residues by 25–83%. We therefore recommend that consumers soak these mushrooms in 0.5% NaHCO3 at 50 °C for 90 min. Pyrethroids exhibit a particularly low PF value of 0.08–0.13%, resulting in a negligible exposure risk upon mushroom consumption. This study provides guidance for the safe application of pyrethroids to edible fungi, and for the establishment of MRLs in mushrooms to reduce pesticide exposure in humans.

show abstract

Section: Resultsmentioning

confidence: 99%

Dissipation and Migration of Pyrethroids in Auricularia polytricha Mont. from Cultivation to Postharvest Processing and Dietary Risk

Xiao

Duan

et al. 2018

Molecules

Self Cite

View full text Add to dashboard Cite

show abstract

“…Lin et al reported a decrease between 4.31% and 31.7% in the transfer rate of polycyclic aromatic hydrocarbons with increasing octanol–water partition coefficient [ 30 ]. In addition, continuous boiling and increased brewing times can lead to a higher transfer of pesticides into the tea infusion [ 12 ]. As reported by Ozbey and Uygun [ 17 ], the transfer rate of chlorpyrifos varies between 11% and 91% for brewing times between five and 20 min.…”

Section: Resultsmentioning

confidence: 99%

“…However, there is also evidence that pesticides can be transferred from the tea matrix to the infusion during preparation [ 10 ]. The transfer rates of several kinds of pesticides, such as pyrethroids, organophosphorus compounds, neonicotinoids, carbamates, and benzoylurea, have been reported in the range from 0 to 85% [ 11 , 12 ]. Whereas most studies have focused on the transfer of pesticides from green tea or black tea [ 13 ] to infusions, only limited information is available on the transfer of pesticide residues from herbal tea.…”

Section: Introductionmentioning

confidence: 99%

Factors Affecting Transfer of Pyrethroid Residues from Herbal Teas to Infusion and Influence of Physicochemical Properties of Pesticides

Xiao

Fang

et al. 2017

IJERPH

Self Cite

View full text Add to dashboard Cite

The transfer of pesticide residues from herbal teas to their infusion is a subject of particular interest. In this study, a multi-residue analytical method for the determination of pyrethroids (fenpropathrin, beta-cypermethrin, lambda-cyhalothrin, and fenvalerate) in honeysuckle, chrysanthemum, wolfberry, and licorice and their infusion samples was validated. The transfer of pyrethroid residues from tea to infusion was investigated at different water temperatures, tea/water ratios, and infusion intervals/times. The results show that low amounts (0–6.70%) of pyrethroids were transferred under the different tea brewing conditions examined, indicating that the infusion process reduced the pyrethroid content in the extracted liquid by over 90%. Similar results were obtained for the different tea varieties, and pesticides with high water solubility and low octanol–water partition coefficients (log Kow) exhibited high transfer rates. Moreover, the estimated values of the exposure risk to the pyrethroids were in the range of 0.0022–0.33, indicating that the daily intake of the four pyrethroid residues from herbal tea can be regarded as safe. The present results can support the identification of suitable tea brewing conditions for significantly reducing the pesticide residue levels in the infusion.

show abstract

“…19 To the best of our knowledge, scarcely any studies about the simultaneous determination of tolfenpyrad, dinotefuran and its metabolites in tea have been reported to date. Furthermore, although research has been carried out on the dissipation of pesticides during tea planting, processing and brewing, 1,3,4,[20][21][22][23][24] scarcely any literature has reported in the residue behavior and brewing transfer of tolfenpyrad, dinotefuran and its metabolites in tea. Therefore, it is significant to establish a reliable method for the simultaneous determination of tolfenpyrad, dinotefuran and its metabolites in tea, and use this to investigate their behavior during tea growth and tea brewing.…”

Section: Introductionmentioning

confidence: 99%

Residue behavior, transfer and risk assessment of tolfenpyrad, dinotefuran and its metabolites during tea growing and tea brewing

Bai

Chen

et al. 2021

J Sci Food Agric

View full text Add to dashboard Cite

BACKGROUND: Tolfenpyrad and dinotefuran are two representative pesticides used for pest control in tea gardens. Their application may bring about a potential risk to the health of consumers. Therefore, it is essential to investigate the residue behavior, transfer and risk assessment of tolfenpyrad, dinotefuran and metabolites from tea garden to teacup.RESULTS: An effective analytical method was established and validated to simultaneously determine tolfenpyrad, dinotefuran and its metabolites (DN and UF) in tea. The average recoveries of tolfenpyrad, dinotefuran, DN and UF were in the range 72.1-106.3%, with relative standard deviations lower than 11.8%. On the basis of the proposed method, the dissipation of tolfenpyrad and dinotefuran in fresh tea leaves followed first-order kinetics models with half-lives of 4.30-7.33 days and 4.65-5.50 days, respectively. With application amounts of 112.5-168.75 g a.i. ha -1 once or twice, the terminal residues of tolfenpyrad and total dinotefuran in green tea were lower than 19.6 and 7.13 mg kg −1 , respectively, and below their corresponding maximum residue limits . The leaching rates of tolfenpyrad and total dinotefuran during the tea brewing were in the ranges 1.4-2.3% and 93.7-98.1%, respectively. CONCLUSION: Tolfenpyrad and dinotefuran in tea were easily degraded. The RQ c and RQ a values for tolfenpyrad were 37.6% and 5.4%, which were much higher than for dinotefuran at 24.7% and 0.84%, respectively. The data indicated that there was no significant health risk in tea for consumers at the recommended dosages. The results provide scientific data regarding the reasonable use of tolfenpyrad and dinotefuran aiming to ensure safe tea consuption.

show abstract

Dissipation behavior of octachlorodipropyl ether residues during tea planting and brewing process

Cited by 11 publications

References 30 publications

Dissipation and Migration of Pyrethroids in Auricularia polytricha Mont. from Cultivation to Postharvest Processing and Dietary Risk

Dissipation and Migration of Pyrethroids in Auricularia polytricha Mont. from Cultivation to Postharvest Processing and Dietary Risk

Factors Affecting Transfer of Pyrethroid Residues from Herbal Teas to Infusion and Influence of Physicochemical Properties of Pesticides

Residue behavior, transfer and risk assessment of tolfenpyrad, dinotefuran and its metabolites during tea growing and tea brewing

Contact Info

Product

Resources

About