Preparação de um material de referência certificado para controle de agrotóxicos em hortifrutigranjeiros: estudo da estabilidade

Cardoso, Maria Helena Wohlers Morelli; Nóbrega, Armi Wanderley da; Vital, Hélio de Carvalho; Abrantes, Shirley de Mello Pereira

doi:10.1590/s0101-20612010000200022

Cited by 5 publications

(4 citation statements)

References 6 publications

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“…Usage of chlorpyrifos as a pesticide on various crops is very common throughout the world (Cardoso et al, 2010;Li et al, 2015). It was detected in two samples which were coded as S16 and S17 in concentration of 3.3 mg/kg and 1.45 mg/kg respectively exceeding the MRL value of chlorpyrifos in rice (0.5mg/mL) showing its potential to pose significant health risk to the consumers.…”

Section: Resultsmentioning

confidence: 99%

Determination of malathion, chlorpyrifos, λ-cyhalothrin and arsenic in rice

et al. 2021

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Presented study focused on the incidence of pesticides: malathion, chlorpyrifos and λ-cyhalothrin and heavy metal, arsenic in the rice samples collected from the three main rice growing areas. 30 samples of brown Super Kernel Basmati rice and Super Basmati rice varieties, irrigated through tube well irrigation were selected. Highly sensitive and selective method of High Performance Liquid Chromatography was used for determination of pesticides. Results of analysis showed the presence of malathion in one sample in concentration of 18.26 mg/kg, chlorpyrifos in two samples in concentration of 3.3 mg/kg and 1.45 mg/kg respectively and λ-cyhalothrin in one sample in concentration of 1.848 mg/kg. Amount of pesticides detected in these samples were exceeding their maximum residual limits thus showed their strong potential to pose significant health risk. The presence of arsenic in rice was determined by Atomic Absorption Spectrophotometer and it was detected in 12 samples out of 30 in range of 0.04-0.28ppm. The detected arsenic concentration of arsenic in all samples was within the permissible limits set by WHO/FAO.

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Section: Resultsmentioning

confidence: 99%

Determination of malathion, chlorpyrifos, λ-cyhalothrin and arsenic in rice

et al. 2021

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“…Two kinds of stability variation were assessed: a long-duration study, considering the storage length of time and the shelf life, the material stability by measuring the sample property value and in association with time; a short-duration study, in which samples were exposed to diverse temperatures to simulate transportation conditions (2,5) .…”

Section: Methodsmentioning

confidence: 99%

“…The use of stability evaluation assays in conjunction with homogeneity testing is fundamental for the RM certification process, as it is a crucial parameter to indicate the RM preservation status during storage at specific lengths of time and temperature conditions (2,5) .…”

Section: Estabilidade Dos Soros Para O Controle De Qualidade Interno mentioning

confidence: 99%

Study on the stability of internal quality control sera for HIV/AIDS immunodiagnostic tests

Castejon¹,

Yamashiro²,

Oliveira³

et al. 2014

J. Bras. Patol. Med. Lab.

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Introduction: The use of reference materials in order to assure and perform the quality control of analytical measurements is a requirement in clinical laboratories. Objectives: Stability of serum samples, kept frozen at-20°C for long-term storage and at varied temperatures during short periods, was evaluated by investigating the persistency of anti-human immunodeficiency virus (HIV) antibodies reactivity on enzyme-linked immunosorbent assay/enzyme immunoassay (ELISA/EIA), Western blot and indirect immunofluorescence assays. Method: The analyzed sera were part of serum panels (comprised of anti-HIV positive and negative samples), produced at the Immunology Center of Instituto Adolfo Lutz, which have been the reference specimens for producing the internal quality assurance sera of HIV/acquired immunodeficiency syndrome (AIDS) immunodiagnostic assays. Sera stability was assessed in samples stored at-20°C for 56 weeks, and at various temperature conditions: from 2°C to 8°C (refrigerator), from 15°C to 25°C (room temperature), at 37°C (incubator) and at-80°C (freezer) for 24 and 48 hours. The statistical analyses on HIV-negative serum samples (long-term storage) were significant (p < 0.05), and neither adverse effects on these samples as the occurrence of false-positive results nor false-negative results in HIV antibody positive sera were found in both studies. Conclusion: It was possible to conclude that the reference material remained stable for 48 hours at different temperatures (short-term) and it remained stable at-20°C for 56 weeks (long-term).

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“…A utilização de sistemas da qualidade em laboratórios de ensaio promove melhorias no planejamento, na organização, no registro dos dados e na documentação dos procedimentos empregados, desde a entrada no laboratório até a liberação dos resultados (Cardoso, 2008;Hayes, 1996;Roberts, 1999).…”

Section: Laboratórios Analíticosunclassified

Produção de materiais de referência candidatos à certificação em bioquímica laboratorial: soro equino para controle de qualidade nos laboratórios de saúde pública

Carneiro¹

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Preparação de um material de referência certificado para controle de agrotóxicos em hortifrutigranjeiros: estudo da estabilidade

Cited by 5 publications

References 6 publications

Determination of malathion, chlorpyrifos, λ-cyhalothrin and arsenic in rice

Determination of malathion, chlorpyrifos, λ-cyhalothrin and arsenic in rice

Study on the stability of internal quality control sera for HIV/AIDS immunodiagnostic tests

Produção de materiais de referência candidatos à certificação em bioquímica laboratorial: soro equino para controle de qualidade nos laboratórios de saúde pública

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