Assessment of Accredited Laboratories for Pesticide Residue Screening in Fresh Vegetables and Fruits Using Simple Test Kits during 2020−2022

Abstract

         Laboratory accreditation for pesticide residue screening in fresh vegetables and fruits is a crucial standard for laboratories that utilize simple test kits. This study aims to analyze nonconformities identified in assessment reports, evaluate the results of Proficiency Testing (PT) participation, compare standards for pesticide residue testing systems in fresh vegetables and fruits (pesticide residue standards) during the years 2020 and 2023 with the international standard ISO/IEC 17025:2017, and assess user satisfaction with the developed information program for laboratory accreditation processes. The findings indicated that the most common nonconformities were in the pesticide residue inspection system (25.9%) and product quality control (18.1%). Among laboratories participating in the PT, 73.8% met the assessment criteria, while 26.2% did not, primarily due to procedural errors by laboratory personnel. The updated standard includes enhancements in internal quality control, confidentiality, and information management. However, compared to ISO/IEC 17025:2017, it still lacks essential elements such as risk management and nonconformity identification, which are fundamental to the quality management system. The developed information system was successfully implemented, receiving an 80.9% satisfaction rating from both laboratories and assessors. This system helps reduce workload, facilitates communication, shortens processing time, systematically records data, and can be adapted for other accreditation standards.