Photodegradation of the Herbicides Butachlor and Ronstar Using Natural Sunlight and Diethylamine

Lin, Yaw-Jian; Lin, C.; Yeh, K. J.; Lee, A.

doi:10.1007/s0012800071

Cited by 19 publications

(9 citation statements)

References 10 publications

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“…Percent degradation, degradation rate, rate constant, and halflife were the most common ways to present the results of photocatalytical studies [10][11][12]20,21]. However, because of different experimental settings applied, those data were not practically to be evaluated among each other on the efficiency of photocatalyses.…”

Section: Introductionmentioning

confidence: 96%

Photocatalysis of 2,2′,3,4,4′,5′-hexachlorobiphenyl and its intermediates using various catalytical preparing methods

Lin

Chen

Huang

et al. 2006

Journal of Hazardous Materials

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Section: Introductionmentioning

confidence: 96%

Photocatalysis of 2,2′,3,4,4′,5′-hexachlorobiphenyl and its intermediates using various catalytical preparing methods

Lin

Chen

Huang

et al. 2006

Journal of Hazardous Materials

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“…50 mg of homogenised sample were diluted with 7 g of CHCl 3 . This solution was passed through a 0.22 µm nylon filter and then introduced in the FTIR measurement cell by using a peristaltic pump.…”

Section: Alternative Ftir Proceduresmentioning

confidence: 99%

“…1 Formulated products containing oxadiazon are presented as 25% (m/v) emulsifiable concentrates and are widely available in the market. 2 Methods based on gas chromatography with flame ionization, 3,4 electron capture, 4 mass spectrometry 5 and nitrogen-phosphorous 4 detection, have been proposed for the determination of oxadiazon residues at trace levels after different clean-up and preconcentration steps, being used the aforementioned procedures in various types of matrices such as river and tap waters, foods and mussels.…”

Section: Introductionmentioning

confidence: 99%

HPLC determination of oxadiazon in commercial pesticide formulations

Quintás¹,

Armenta²,

Moros³

et al. 2008

J. Braz. Chem. Soc.

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Um procedimento simples, rápido e preciso de cromatografia líquida de alta eficiência (HPLC) foi desenvolvido para a determinação de oxadiazona em formulações concentradas de pesticidas emulsificáveis. 20 µL de amostra, diluída em acetronitrila, foram injetados em uma coluna Kromasil C18 (250 × 4,6 mm, 5 µm), usando acetonitrila:água (80:20) como fase móvel, numa velocidade de fluxo de 1 mL min -1 . Oxadiazona foi determinada por medidas de absorbância a 292 nm. Obteve-se, usando-se o procedimento desenvolvido, um limite teórico de detecção de 0,02 µg mL -1 , um limite de quantificação de 0,047 µg mL -1 , correspondendo a 0,02 e 0,07% m/v na amostra original e desvio padrão relativo de 0,08%, para três análises em replicata de amostras contendo 25% m/v de oxadiazona. A precisão do método foi evidenciada pelas porcentagens de recuperação de 98% a 99% para amostras contendo 0,015 a 0,085 mg de oxadiazona, assim como pela comparação entre os resultados encontrados pelo procedimento recomendado e pela espectrofotometria de infravermelho com transformada de Fourier (FTIR), para amostras reais de produtos formulados.A simple, fast and precise high performance liquid chromatographic (HPLC) procedure has been developed for the determination of oxadiazon in emulsifiable concentrated pesticide formulations. 20 µL of diluted sample in acetonitrile were injected in a Kromasil C18 (250 × 4.6 mm, 5 µm) column, using acetonitrile:water (80:20) as mobile phase at 1 mL min -1 flow rate and oxadiazon determined by absorbance measurement at 292 nm. A theoretical limit of detection of 0.02 µg mL -1 , a limit of quantification of 0.047 µg mL -1 , corresponding to a 0.02 and 0.07% m/v in the original sample, and a relative standard deviation of 0.08% for three replicate analysis of samples containing 25% m/v. Oxadiazon were achieved using the developed procedure. The accuracy of the whole method was evidenced by recovery percentages from 98% to 99% for samples spiked with 0.015 to 0.085 mg oxadiazon as well as by the good comparability between results found by the recommended procedure and by Fourier Transform Infrared (FTIR) spectrophotometry for actual samples of formulated products.Keywords: oxadiazon, high performance liquid chromatography, UV-Vis detection, pesticide formulations IntroductionOxadiazon, 5-tert-butyl-3-(2,4-dichloro-5-isopropoxyphenyl)-1,3,4-oxadiazol-2(3H)-one, is a selective pre-emergence herbicide used for the control of annual grasses and many broadleaf weeds in turf and landscape ornamentals. The relatively low toxicity by ingestion and by dermal route of this herbicide is one of the reasons for its widespread use. Methods based on gas chromatography with flame ionization, 3,4 electron capture, 4 mass spectrometry 5 and nitrogen-phosphorous 4 detection, have been proposed for the determination of oxadiazon residues at trace levels after different clean-up and preconcentration steps, being used the aforementioned procedures in various types of matrices such as river and tap waters, foods and mussels.High pres...

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“…To date, several methods have been developed for the detection of F – , including fluorine reagent colorimetry, 12,19 F NMR, 13 ion chromatography, 14 and the ion-selective electrode. 15 However, most approaches dedicated to determining F – levels are complicated, time-consuming, and expensive procedures that have limited adaptability.…”

Section: Introductionmentioning

confidence: 99%

Highly Sensitive Ratiometric Fluorescent Paper Sensors for the Detection of Fluoride Ions

Wang

Yang

et al. 2019

ACS Omega

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Two sensitive and ratiometric fluorescent probes (probe I and probe II) were developed for the detection of fluoride ions. Probe I can detect fluoride ions quantitatively within a range of 0–6 μM and a detection limit of 73 nM, while probe II has a range of 0–40 μM and a detection limit of 138 nM. The test strips from probe I are quickly able to recognize F – (5 min) inside of the F – safety level in drinking water (1.0 mg/L, ∼5 μM) under 254 nm ultraviolet light, and the test strips from probe II quickly recognize F – (12 min) in dangerously high F – levels in water (4.0 mg/L, ∼21 μM) under 254 nm ultraviolet light. This combination of fluorescent paper sensors from probe I and probe II can be used as a simple and convenient tool to determine whether water is safe to drink or dangerous.

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Photodegradation of the Herbicides Butachlor and Ronstar Using Natural Sunlight and Diethylamine

Cited by 19 publications

References 10 publications

Photocatalysis of 2,2′,3,4,4′,5′-hexachlorobiphenyl and its intermediates using various catalytical preparing methods

Photocatalysis of 2,2′,3,4,4′,5′-hexachlorobiphenyl and its intermediates using various catalytical preparing methods

HPLC determination of oxadiazon in commercial pesticide formulations

Highly Sensitive Ratiometric Fluorescent Paper Sensors for the Detection of Fluoride Ions

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