Search Results - "Vieira, Heulla Pereira"

Fast determination of trace elements in organic fertilizers using a cup-horn reactor for ultrasound-assisted extraction and fast sequential flame atomic absorption spectrometry by Teixeira, Leonel Silva, Vieira, Heulla Pereira, Windmöller, Cláudia Carvalhinho, Nascentes, Clésia Cristina

“…A fast and accurate method based on ultrasound-assisted extraction in a cup-horn sonoreactor was developed to determine the total content of Cd, Co, Cr, Cu,…”
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Development and comparison of two analytical methods to quantify the mercury content in honey by Vieira, Heulla Pereira, Nascentes, Clésia Cristina, Windmöller, Cláudia Carvalhinho

“…•Development and validation of 2 methods for Hg in honey using 35 honey samples in Brazil.•Determination of mercury in honey carried out by direct mercury…”
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Otimização e validação da técnica de extração líquido-líquido com partição em baixa temperatura (ELL-PBT) para piretróides em água e análise por CG by Vieira, Heulla Pereira, Neves, Antônio Augusto, Queiroz, Maria Eliana Lopes Ribeiro de

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Otimização e validação da técnica de extração líquido-líquido com partição em baixa temperatura (ELL-PBT) para piretróides em água e análise por CG Optimization and validation af liquid-liquid extraction with the low temperature partition technique (LLE-LTP) for pyrethroids in water and GC analysis by Heulla Pereira Vieira, Antônio Augusto Neves, Maria Eliana Lopes Ribeiro de Queiroz

“…The liquid-liquid extraction with the low temperature partition technique was developed for the analysis of four pyrethroids in water by CG. Using a factorial…”
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