Determination of lead content in pyrotechnics used for fireworks and firecrackers based on inductively coupled plasma optical emission spectrometric approach (ICP-OES)

摘要

Inductively coupled plasma optical emission spectrometric approach (ICP-OES) is used to determine the lead content in pyrotechnics used for fireworks and firecrackers. Element of lead is commonly found as impurity in chemical materials used for pyrotechnics in fireworks and firecrackers. Statistical analysis shows that lead content in pyrotechnics is below 5%. Concept of this method: considering the weight of the sample is 400mg, constant volume is 0.5L and the concentration of lead is below 40mg/L in sample solution, the determination scope of the method for the lead content would be between 5%. Further experiments proved that the fitting correlation coefficient of lead calibration curve is 0.9997 or higher, recovery is 92.53%-115.63%. The allowable differential value is 0.4% between two single tests under repeatable conditions. This method can completely satisfy the requirements of the fireworks and firecrackers industry with high accuracy and good precision.