Jump to main content
Jump to site search


Sample Preparation of Lipstick for Further Cd and Pb Determination by ICP-MS: Is the Use of Complexing Acids Really Necessary?

Abstract

In this work, the use of complexing acids (HF and HCl) combined with HNO3 was carefully evaluated for the digestion of several types of lipstick and further Cd and Pb determination by inductively coupled plasma mass spectrometry (ICP-MS). Creamy, opaque and shimmering lipsticks were digested using HNO3 (6 mL) or a mixture containing HNO3 (6 mL) plus HCl (0.5 or 2 mL) or HNO3 (6 mL) plus HF (2 mL). The results indicate that complexing acids are not required for the subsequent determination of Cd in all types of lipsticks evaluated by ICP-MS. On the other hand, complexing acids were essential for assuring quantitative results for Pb in shimmering lipstick. Thus, by using HNO3 combined with only 0.5 mL of HCl, it was possible to obtain quantitative results for Pb and Cd in lipsticks. In these conditions, recoveries for Cd and Pb were between 95 and 103%. No statistical difference was observed between the results obtained using the proposed method (HNO3/HCl) and those obtained using HNO3/HF, where a complete dissolution of the lipsticks’ inorganic fraction occurred. Moreover, by using HCl, HF was avoided, allowing for solutions more compatible with ICP-MS analysis. The limits of detection for Cd and Pb were 3 and 77 ng g-1, respectively. This method was applied for a variety of lipsticks, and the concentration of Cd and Pb ranged from <3 to 31 ng g-1 and 271 to 2250 ng g-1, respectively.

Back to tab navigation

Publication details

The article was received on 10 Apr 2017, accepted on 13 Jun 2017 and first published on 13 Jun 2017


Article type: Paper
DOI: 10.1039/C7JA00139H
Citation: J. Anal. At. Spectrom., 2017, Accepted Manuscript
  •   Request permissions

    Sample Preparation of Lipstick for Further Cd and Pb Determination by ICP-MS: Is the Use of Complexing Acids Really Necessary?

    M. F. Mesko, D. L. R. Novo, F. S. Rondan, R. M. Pereira and V. C. Costa, J. Anal. At. Spectrom., 2017, Accepted Manuscript , DOI: 10.1039/C7JA00139H

Search articles by author

Spotlight

Advertisements