Cosmeticswere purchased fromlocal commercial suppliers. Samples were spiked with the ricin provided by B. Beaumelle,Ph.D. of Montpellier University.
Eye make up samples were diluted 1:1 with 10 mMPBS / 0.1% Tween-20 / 5% non-fat milk (PBSTM) and analyzed using the LFDs according to manufac-manufacturer's instructions. Themore viscous shampoo and body lotion samples were first diluted 1:9 and 1:19, respectively, with PBS and then diluted 1:1 with PBSTM to generate the 50% PBSTM solution for analysis with the LFDs.