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Assessing Skin Permeation of Benzalkonium Chloride on Porcine Skin : A Comparative Study Using Franz Diffusion Cell and LC-MS

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1. Introduction 1
2. Materials 5
2.1. Materials and chemicals 5
2.2. Skin preparation 6
2.3. Fabrics 6
2.4. Dosing solutions 7
2.5. Receptor fluid 7
3. Method 9
3.1. Permeation test 9
3.2. Sample preparation 11
3.3. Liquid chromatography 13
3.4. Mass spectrometry 14
3.5. Data analysis (Flux, Kp) 16
4. Results 17
4.1. Liquid contact penetration experiment 17
4.1.1. Experiment using artificial sweat with a pH 4.7 17
4.1.2. Experiment using artificial sweat with a pH 6.5 22
4.2. Penetration experiments with fabric contact 28
4.2.1. Experiment using artificial sweat with a pH 4.7 28
4.2.2. Experiment using artificial sweat with a pH 6.5 32
5. Discussion 38
5.1. Flux value 38
5.2. Permeation coefficient (Kp) 40
5.3. Analysis of residual amount of BAC chains in the skin 43
6. Conclusion 44
7. References 45

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