Este trabalho baseia-se na quimioluminescência (CL) intensificada da reação entre luminol e diperiodato de prata (III) (K[Ag(H 3 IO 6 ) 2 ], DPA) em solução alcalina para determinação da glutadiona (GSH). Na presença de nanopartículas magnéticas do complexo de inclusão β-ciclodextrina (β-CD)/nanopartículas magnéticas MnFe 2 O 4 (MNPs), os resultados experimentais mostraram que a emissão CL foi muito rápida (tempo de resposta de ca. 1 s, parâmetro muito importante em análise clínica) e aguda (sinal CL aumentado de 9 vezes). Os efeitos catalíticos das MNPs β-CD/MNPs MnFe 2 O 4 na resposta CL do sistema luminol-DPA foram investigados. A linearidade do método dependeu da concentração da GSH nos intervalos de 5,0 × 10 -8 a 4,0 × 10 -6 mol L -1, o limite de detecção calculado foi 1,5 × 10 -8 mol L -1 e desvio padrão relativo de 2,8% para 9 replicatas de GSH 8,0 × 10 -7 mol L -1 . O método proposto foi aplicado com sucesso na determinação rápida e sensível da GSH em amostras de sangue humano.This work is based on the enhanced chemiluminescence (CL) of the reaction between luminol and diperiodatoargentate(III) (DPA) {K[Ag(H 3 IO 6 ) 2 ]} in alkaline solution for determination of glutathione (GSH). In the presence of inclusion complex β-cyclodextrin (β-CD)/MnFe 2 O 4 magnetic nanoparticles (MNPs), the experimental results showed that the CL emission was very fast (response time of about 1 s, which is a very important parameter in the clinical analysis) and sharp (CL signal increased 9 times). The catalytic effects of β-CD/MnFe 2 O 4 MNPs on the CL response of luminol-DPA system were investigated. The linearly of method depended on GSH concentration in the ranges of 5.0 × 10 -8 to 4.0 × 10 -6 mol L -1 and limit of detection calculated was 1.5 × 10 -8 mol L -1 and relative standard deviation of 2.8% for 9 replicated measurements of 8.0 × 10 -7 mol L -1 GSH. The proposed method was successfully applied for rapid and sensitive determination of GSH in human blood samples.
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