Measurement of organochlorine pesticides in drinking water: laboratory technical proficiency testing in Mexico

Leyva-Morales, José Belisario; Bastidas-Bastidas, Pedro; Muñiz‐Valencia, Roberto; Ceballos‐Magaña, Silvia G.; Ponce-Vélez, Guadalupe; Aguilera-Márquez, Daniela; Grajeda-Cota, Patricia; Navidad-Murrieta, Migdalia Sarahy; Flores-Munguia, M.E.; Ramírez-Castillo, Jesús Adriana; Romero-Bañuelos, Carlos Alberto; Ruíz-Ramos, Rubén; Aguilar-Zárate, Gabriela; Huerta-Beristain, Gerardo

doi:10.1007/s00769-019-01403-w

Cited by 6 publications

(2 citation statements)

References 28 publications

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“…Low‐concentration values are excluded, despite being able to analyze them. [ 51 ] Overestimation of concentrations has a higher chance to occur near background levels. [ 52 ]…”

Section: Resultsmentioning

confidence: 99%

Detection of organochlorine pesticides in estuarine sediments of protected wetlands in Taiwan using high‐resolution gas chromatography/high‐resolution mass spectrometry and gas chromatography‐electron capture detector

Lai

Chi

Zhou

et al. 2023

J Chinese Chemical Soc

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Trace residues of organochlorine pesticides (OCPs) in estuarine surface sediments were investigated at three protected wetlands in southern Taiwan using high‐resolution gas chromatography/high‐resolution mass spectrometry (HRGC/HRMS) and gas chromatography‐electron capture detector (GC‐ECD). This study facilitates the development of new strategies for investigating OCPs, particularly at background levels. Linear relationships were obtained between total OCP concentrations (∑OCP), as analyzed by HRGC/HRMS, and the sediment's total organic carbon (TOC) and water content. It contrasted with the results acquired by GC‐ECD, where no significant relationship was found. GC‐ECD is a rugged option for daily routine practice, particularly in cases of patterns yielded by GC‐ECD is clear; the HRGC/HRMS method provides more reliable qualitative and quantitative capabilities and is highly recommended for studying the fate of OCPs and carrying out risk assessments. The average ∑OCP of these three wetlands by HRGC/HRMS was found in a range of 0.214 to 1.049 ng/g dry weight. The highest OCP level might be attributed to associated irrigation systems receiving massive discharges of domestic sewage from an urban area upstream of the wetland. The ratio of dichlorodiphenyltrichloroethane (DDT) to its metabolites indicated that the DDT residue in these areas was from aged input. According to sediment quality guidelines, adverse ecotoxicological effects of OCPs upon sediments were not expected in these protected wetlands.

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“…Low‐concentration values are excluded, despite being able to analyze them. [ 51 ] Overestimation of concentrations has a higher chance to occur near background levels. [ 52 ]…”

Section: Resultsmentioning

confidence: 99%

Detection of organochlorine pesticides in estuarine sediments of protected wetlands in Taiwan using high‐resolution gas chromatography/high‐resolution mass spectrometry and gas chromatography‐electron capture detector

Lai

Chi

Zhou

et al. 2023

J Chinese Chemical Soc

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“…Meanwhile, as an assessment of the quality of analytical results, laboratories are required to join proficiency testing (PT) if available and relevant [ 32 – 36 ]. Pesticide residues PTs are very important in quality testing due to the pesticide residues test increasing demand with different types of pesticides and various matrices.…”

Section: Introductionmentioning

confidence: 99%

Pesticide residues in fruits and vegetables in Indonesia: findings of five-year proficiency testing

Pitoi¹,

Harmoko²,

Tresnawati³

et al. 2022

Accred Qual Assur

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The first proficiency testing of pesticides in fruits and vegetables in Indonesia is reported. This report covers the findings of five-year proficiency testings. Every year, from 2016 to 2020, 18–25 laboratories join the proficiency testings and analyze 5–11 pesticides in tomato, orange, lettuce, brown rice, strawberry respectively. The number of laboratories participating in the proficiency testings tends to increase, although only 38 % of the laboratories are able to report all pesticides. More than 72 % of participants use QuEChERS or its modifications for sample preparation, all participants use gas chromatography or liquid chromatography for separation, at least 20 % of participants still rely on detectors other than mass spectrophotometer for detection, and 20 %–60 % of participants use matrix-matched calibration for quantification. The performance of laboratories is evaluated as z -score with an average of 90.8 % achieves satisfactory results while 3.3 % and 5.9 % achieve questionable and unsatisfactory results correspondingly. Overall, the performance of laboratory participants during proficiency testings is good. However, improvement is still needed, especially for the number of target pesticides for multi-residue pesticide analysis. Moreover, unsatisfactory z -scores are likely to be resulted from laboratories which use conventional solvent extraction, use detectors other than mass spectrometers, and are not accredited.

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Trends in the development of proficiency testing for chemical analysis: focus on food and environmental matrices

et al. 2022

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Measurement of organochlorine pesticides in drinking water: laboratory technical proficiency testing in Mexico

Cited by 6 publications

References 28 publications

Detection of organochlorine pesticides in estuarine sediments of protected wetlands in Taiwan using high‐resolution gas chromatography/high‐resolution mass spectrometry and gas chromatography‐electron capture detector

Detection of organochlorine pesticides in estuarine sediments of protected wetlands in Taiwan using high‐resolution gas chromatography/high‐resolution mass spectrometry and gas chromatography‐electron capture detector

Pesticide residues in fruits and vegetables in Indonesia: findings of five-year proficiency testing

Trends in the development of proficiency testing for chemical analysis: focus on food and environmental matrices

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