Questões de Concurso Público UFAM 2026 para Químico
Foram encontradas 2 questões
"For optimal detection of compounds absorbing in the 200 - 300 nm range, set the wavelength between 220 - 230 nm . For compounds with stronger absorbance above 300 nm, use wavelengths around 280 - 290 nm. Adjust the wavelength to maximize the signal intensity while avoiding excessive noise."
Com base no trecho citado, a instrução CORRETA para o ajuste do comprimento de onda em CLAE é:
"For the calibration of the FID detector, introduce a known concentration of the target analyte into the chromatograph and adjust the hydrogen flow to achieve a stable baseline. The flow rate should be set to 40mL
min-1. Next, adjust the air flow to a value of 450mL
min-1. After achieving baseline stability, inject the
analyte and record the peak area. If the peak area does
not correlate with the expected value, verify the detector’s
sensitivity settings." Com base nesse trecho, o primeiro passo na calibração do detector FID é: