UNE 81-569-1991 Air quality. Workplace atmospheres. Determination of metallic lead and their ionic compounds. Flame atomic absorption spectrometric method
This standard specifies a method for determining the average concentration of metallic lead and its ionic compounds in air at the workplace. It is not applicable to the determination of alkyl compounds. The method is applied to the determination of masses of approximately 10 pg to 200 pg of lead per sample (if the 283.3 nm lead line is used) or from 5 ug to 100 ug of lead per sample (if uses the 217.0 nm line) using the normal procedure without concentration or dilution. For example, for a sampling volume of 200 I, these mass ranges would correspond to air concentrations of 50 ug/m3 to 1,000 ug/m3 and 25 ug/m3 to 500 pg/m3 respectively. The range of lead concentration in air to which this method is applied is determined, in part, by the sampling procedure selected by the user. The filter must not be overloaded. The method is applicable to personal and static sampling. Problems may arise due to the solubilization of the sample and the presence of spectral and chemical interferences that will be treated as special cases in chapter 11.