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Dissipation pattern and risk quotients assessment of amisulbrom in Korean melon cultivated in plastic house conditions

Author:
Kabir, Md. Humayun, Abd El-Aty, A. M., Rahman, Md. Musfiqur, Chung, Hyung Suk, Lee, Han Sol, Park, Sun-Hyang, Hacımüftüoğlu, Fazil, Chang, Byung-Joon, Shin, Ho-Chul, Shim, Jae-Han
Source:
Environmental monitoring and assessment 2017 v.189 no.6 pp. 302
ISSN:
0167-6369
Subject:
adverse effects, cleaning, correlation, half life, liquid chromatography, liquid-liquid extraction, maximum residue limits, melons, risk, risk assessment, solid phase extraction, tandem mass spectrometry
Abstract:
Amisulbrom formulated as suspension concentrate was applied at the rate recommended for Korean melon to determine the dissipation pattern (at two different sites), the pre-harvest residue limit (PHRL), and risk assessments. Samples collected over 10 days were extracted using liquid-liquid extraction (LLE) and cleaned up with solid-phase extraction (SPE) Florisil cartridge. Residual concentrations were determined using liquid chromatography-ultraviolet detector (LC-UVD) and confirmed by liquid chromatography-tandem mass spectrometry (LC-MS/MS). The standard showed good instrument response linearity with a correlation coefficient (R ²) = 0.9999, and the recovery ranged from 87.5 to 93.7%. The dissipation half-life calculated from two different sites were found to be 7.0 and 8.8 days for sites 1 and 2, respectively. A PHRL graph constructed from the data indicated that if the residue levels were less than 0.55–0.59 mg/kg 3 days before harvest or less than 0.61–0.74 mg/kg 7 days before harvest, then they would be lower than the maximum residue limits (MRLs) at harvest. Risk assessments showed that the risk quotient (RQ) was 4.39–3.47% at 0 day, declined to 1.53–1.63% at 10 days. Therefore, the current data indicate that the amisulbrom can be applied safely to Korean melon; hence, it is unlikely to induce adverse health effects in consumers.