English term
Brazil
LAW, Industrial Machinery, IT - 22yrs
Native in: Portuguese
Works in: English to Portuguese, Spanish to Portuguese, French to Portuguese
weighing to the nearest milligram
X5.1.1 Prepare a mineral oil or site-specific oil standard by weighing to the nearest milligram and dissolving in American Chemical Society (ACS) or better pentane or certified LPG.
Choose the weighed sample amount and volume of diluent to give a residue concentration at twice the expected concentration in the routine samples.
Proposed translations
Brazil
Always in search of the best solution!
Native in: Portuguese (Variant: Brazilian)
Works in: English to Portuguese, Spanish to Portuguese, Portuguese, and 2 more.
pesando-o com aproximação de miligramas
"A massa de amostra deve ser determinada com aproximação de miligramas"
"Equilibrar o filtro no ambiente condicionador por 24 horas,
pesá-lo com aproximação de miligrama"
file:///C:/Users/dell/Downloads/Planning_of_experiments_4._Planning_of_t.pdf
"Se a pesagem é efetuada em uma balança com aproximação de miligramas, o número de categorias possíveis cresce consideravelmente, mas o princípio permanece o mesmo. "
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Note added at 5 días (2019-08-19 12:50:47 GMT) Post-grading
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Muito obrigada, Izabel!
Brazil
IT Specialist • M.A. in Linguistics
Native in: Portuguese (Variant: Brazilian) 
Works in: English to Portuguese, Spanish to Portuguese, Portuguese to English, and 1 more.
realizando a pesagem com arredondamento na casa dos miligramas (ou do miligrama mais próximo)
IMO, seria pesar e arredondar na casa dos mg. Ex.: se o resultado da pesagem for 13,24 mg, seria arredondado para 13 mg.
Brazil
Linguist EN-PT, MBA Marketing
Native in: Portuguese (Variant: Brazilian)
Works in: English to Portuguese, Portuguese to English, Portuguese
Pesar arredondando para a miligramagem mais próxima
Portuguese to English, English to Portug
Native in: English 
Works in: Portuguese to English, English to Portuguese
pesagem dentro da tolerância de mais um, ou menos um, miligrama
Brazil
The language of science and technology
Native in: Portuguese (Variant: Brazilian)
Works in: English to Portuguese, Italian to Portuguese, Portuguese to English, and 2 more.
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