scholarly journals DETERMINAÇÃO DE GLIFOSATO E ÁCIDO AMINOMETILFOSFÔNICO EM ÁGUAS SUPERFICIAIS DO ARROIO PASSO DO PILÃO

2003 ◽  
Vol 13 ◽  
Author(s):  
MARCELO DUTRA DA SILVA ◽  
MARIA DO CARMO RUARO PERALBA ◽  
MARIA LAURA TURINO MATTOS
Keyword(s):  
High Performance Liquid Chromatography ◽  
Environmental Protection Agency ◽  
High Performance ◽  
Herbicide Application ◽  
Protection Agency ◽  
Brazilian Legislation ◽  
Aminomethylphosphonic Acid ◽  
Glyphosate Herbicide ◽  
High Concentrations

Para investigar a presença do herbicida Glifosato na microbacia hidrográfica arroio Passo do Pilão foram coletadas amostras de água em 15 distintos pontos no arroio Passo do Pilão, nos períodos de 30 e 60 dias após a aplicação do herbicida (DAAH), as quais foram analisadas por cromatografia a líquido de alta eficiência (CLAE). As análises revelaram a presença do herbicida nas águas superficiais dessa microbacia, tanto nas amostras após 30 dias de aplicação do Glifosato como nas de 60 DAAH. Concentrações elevadas (acima de 100 ppb) foram detectadas, principalmente em pontos próximos às áreas de intenso cultivo. As concentrações detectadas foram menores que 500 e 700 ppb, limites de concentrações máximas permitidas para o Glifosato pela legislação brasileira e pela Agência de Proteção Ambiental dos Estados Unidos, respectivamente. DETERMINATION OF GLYPHOSATE AND AMINOMETHYLPHOSPHONIC ACID IN SUPERFICIAL WATERS OF ARROIO PASSO DO PILÃO Abstract To investigation the presence of Glyphosate herbicide in Arroio Passo do Pilão watershed, samples of water were collected in 15 distinct points in Arroio Passo do Pilão, in period of 30 and 60 days after herbicide application (DAHA), which were analysed by high performance liquid chromatography (HPLC). The analysis revealed the presence of the herbicide in superficial areas of this watershed, even in the samples after 30 days of Glyphosate applicatication as in 60 DAHA. High concentrations (above 100 ppb) were detected, mainly in points near to intense cultivation areas. The concentrations detected were smaller than 500 and 700 ppb, limits of the maximum concentrations allowed for Glyphosate by the brazilian legislation and by the Environmental Protection Agency of United States, respectivelly.

scholarly journals BIODEGRADAÇÃO DE GLIFOSATO EM DOIS SOLOS BRASILEIROS

2003 ◽  
Vol 13 ◽  
Author(s):  
ADEMIR SÉRGIO FERREIRA DE ARAÚJO ◽  
REGINA TERESA ROSIM MONTEIRO ◽  
ROSÂNGELA BLOTA ABAKERLI ◽  
LOURDES SILVESTRE DE SOUZA
Keyword(s):  
High Performance Liquid Chromatography ◽  
High Performance ◽  
Soil Microorganisms ◽  
Soil Samples ◽  
Co2 Evolution ◽  
Herbicide Application ◽  
Main Metabolite ◽  
Aminomethylphosphonic Acid ◽  
Brazilian Soils ◽  
Type 3

Avaliou-se a biodegradação de Glifosato em amostras de dois solos brasileiros, ambos com e sem histórico de uso prévio do herbicida. Aplicou-se o Glifosato em 75 g de cada amostra de solo (três repetições) na dosagem recomendada para condição de campo (2,16 kg i.a./ha). A biodegradação foi avaliada monitorando-se a liberação do CO2 pelos microrganismos no período de 32 dias. Durante esse período foram quantificados os resíduos de Glifosato e seu principal metabólito por meio de extração, seguida de análise por Cromatografia a Líquido de Alta Eficiência. Os resultados mostraram que o Glifosato foi degradado pelos microrganismos do solo, com formação de seu metabólito ácido aminometilfosfônico (AMPA). A degradação mostrouse ligeiramente superior em Argissolo que em Latossolo. BIODEGRADATION OF GLYPHOSATE IN TWO BRAZILIAN SOILS Abstract It was evaluated the Glyphosate biodegradation in two Brazilian soil samples, both with and without report of previous herbicide application. Samples of 75 g of each soil type (3 replicates) were used and Glyphosate was applied in the recommended dose for field condition (2.16 kg a.i./ha). The assessment of biodegradation was done using the CO2 evolution during a 32 days period. During this period the Glyphosate residues, and its main metabolite were quantified, after extraction and analysis by high performance liquid chromatography. The results showed that Glyphosate was degraded by the soil microorganisms, with formation of its metabolite, the aminomethylphosphonic acid (AMPA). The degradation was faster in the Hapludult than in Hapludox soil.

scholarly journals Determination of acrolein, ethanol, volatile acidity, and copper in different samples of sugarcane spirits

2012 ◽  
Vol 32 (3) ◽  
pp. 568-572 ◽  
Author(s):  
José Masson ◽  
Maria das Graças Cardoso ◽  
Lidiany Mendonça Zacaroni ◽  
Jeancarlo Pereira dos Anjos ◽  
Adelir Aparecida Sackz ◽  
...  
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
High Performance ◽  
Minas Gerais ◽  
Volatile Acidity ◽  
Legal Limits ◽  
Brazilian Legislation ◽  
Significant Difference ◽  
Average Size

Seventy-one samples of sugarcane spirits from small and average size stills produced in the northern and southern Minas Gerais (Brazil) were analyzed for acrolein using HPLC (High Performance Liquid Chromatography). Ethanol and copper concentrations and volatile acidity were also determined according to methods established by the Ministry of Agriculture, Livestock and Supply (MAPA). A total of 9.85% of the samples tested showed levels of acrolein above the legal limits, while the copper concentrations of 21.00% of the samples and the volatile acidity of 8.85% of the samples were higher than the limits established by the Brazilian legislation. The concentration of acrolein varied from 0 to 21.97 mg.100 mL-1 of ethanol. However, no significant difference at 5% of significance was observed between the samples produced in the northern and southern Minas Gerais. The method used for determination of acrolein in sugarcane spirits involved the formation of a derivative with 2,4-dinitrophenylhydrazine (2,4-DNPH) and subsequent analysis by HPLC.

scholarly journals Distribution of Lindane in Water, Sediment, and Fish from the Warri River of the Niger Delta, Nigeria

2008 ◽  
Vol 59 (4) ◽  
pp. 261-270 ◽  
Author(s):  
Lawrence Ezemonye ◽  
Thomas Ikpesu ◽  
Isioma Tongo
Keyword(s):  
European Union ◽  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Environmental Protection Agency ◽  
Niger Delta ◽  
High Performance ◽  
Dry Weight ◽  
Protection Agency ◽  
Residue Levels ◽  
Environmental Compartments

Distribution of Lindane in Water, Sediment, and Fish from the Warri River of the Niger Delta, NigeriaThis paper is the first attempt to quantify the levels and the distribution pattern of lindane in the surface water, sediment and fish (Chrysichthys furcatus and Tilapia zilli). The samples were collected from three stations (Ovwian, Ekakpamre, and Ovu) of the Warri River in the western Niger Delta of Nigeria in 2006: during the dry (January-April) and wet seasons (May-August). The analysis included a total of 96 samples made up of 24 samples each for water, sediment, and fish. The pesticide levels were analysed using high performance liquid chromatography to elucidate its distribution in various environmental compartments. Residue levels in the matrices ranged from below the detection limit (BDL) to 1.37μg L-1 in water, BDL to 12.66 μg g-1 dry weight (dw) in sediment, BDL to 16.67 μg g-1dw in Chrysichthys furcatus, and BDL to 0.15 μg g-1dw in Tilapia zilli. The observed values were above the ecological benchmarks (0.01 μg L-1) recommended by the Nigerian Environmental Protection Agency and European Union. They were also relatively higher than in previous studies on the Nigerian environment, which calls for regular monitoring of the Niger Delta water bodies.

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