Abstract
−1 , respectivamente. Direct solid sampling is proposed for Pb determination in eye shadow and blush samples by high- resolution continuum source graphite furnace atomic absorption spectrometry (HR-CS GF AAS). A mixture of Pd(NO3)2 + Mg(NO3)2 was employed as chemical modifier, and aqueous calibration (0.25-2.5 ng Pb, r = 0.998) was obtained. Accuracy of the determination of Pb in eye shadow and blush samples by the proposed method was verified by line source graphite furnace AAS as a comparative technique employing digested samples. The results obtained by the two methods were in agreement at a 95% confidence level (paired t-test). The limit of quantification (dry mass) was 0.020 ng mg −1 . The Pb content in the eye shadow and blush samples varied between 1.222 and 9.632 ng mg −1 and 0.362 and 28.091 ng mg −1 , respectively.
Highlights
The global cosmetics industry is growing by 4.5% annually.[1]
This study reports on the development of a simple, fast and reliable method for the determination of Pb in eye shadow and blush samples by HR-CS graphite furnace atomic absorption spectrometry (GF AAS) using direct solid sampling
The thermal behavior of Pb was evaluated in aqueous medium (1.5 ng Pb) and in eye shadow samples (0.2‐0.3 mg) by means of pyrolysis and atomization temperature curves established in the absence and presence of 5.0 μg Pd(NO3)[2]
Summary
The global cosmetics industry is growing by 4.5% annually.[1]. The worldwide market and the consumption of cosmetic products by adults and children require proficient quality control.
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