Graphite furnace atomic absorption spectrometry determination of lead content in urine of factors

Objective:Graphite furnace atomic absorption spectrometry determination of lead content in urine of factors,to find a solution.Methods: The standard addition method;control of the absorbance of the blank tube;parameters of graphite furnace heating a reasonable choice;use of pyrolytic coated graphite tube;choose a suitable matrix modifier agent and select the appropriate dosage.Results: The precision of the recovery test and the standard quality control urine samples were determined to meet the requirements of the standard curve in the 0 μg/L~80 μg/L was well inside the range,the average regression equation: Y=0.00113C-0.0052,correlation coefficient r=0.99935.The detection limit was 7.42 μg/L,to meet the diagnosis of occupational lead absorption and lead poisoning requirements.Conclusion: The use of graphite furnace atomic absorption spectrometry determination of lead in urine,simple,fast,high recovery rate and less background interference,accurate and which can be high,suitable for a large sample population occupational exposure to the determination of lead in urine.