JOURNAL OF COSMETIC SCIENCE 216 (5) Skin Protectant Dru g Products for Over-The-Counter Human Use Skin Protection, 21 C.F.R. § 347.10 (2018). (6) C. Flaviana da Silva Acunha and J. H. Zimnoch dos Santos, An analytical method for quantifying di- methicone in a 30% simethicone emulsion using gas chromatography, Br. J. Anal. Chem., 6, 278–285 (2011). (7) S. Andersson, D. A. Y oung, and S. Jacobssen, Quantitation of polydimethylsiloxane in pharmaceutical formulations by gel permeation chromatography, J. Chromatogr. A, 477, 474–476 (1989). (8) D. E. Moore, T. X. Li u, W. G. Miao, A. Edwards, and R. Elliss, A RP-LC method with evaporative light scattering detection for the assay of simethicone in pharmaceutical formulations, J. Pharm. Biomed. Anal., 30, 273–278 (2002). (9) L. Sandford and M. Wo odman, “UHPLC Analysis of Dimethicone (Polydimethylsiloxane) by Gradient Elution with ELSD,” HPLC2016, (Agilent Technologies Inc., San Francisco, CA, 2016), accessed April 8, 2019, https://www.agilent.com/cs/library/posters/public/HPLC2016_P-Th-2301_Dimethicone.pdf. (10) Dimethicone Applica t ion Note #0048E, (Alltech Associates, Inc., Deerfi eld, IL, 2000), accessed April 8, 2019, https://docslide.net/documents/note-0048e-dimethicone-associates-inc-2051-waukegan-road- deerfi eld.html. (11) J. J. Jadhav, S. Mu n gekar, J. V. Velada, H. A. Doshi, V. Gajbe, and K. Raunak, A simple and rapid HPLC method for estimation of Dimethicone from formulations, Indian Drugs, 50, 26–29 (2013). (12) J. V. Gruber, B. R . Lamoureux, N. Joshi, and L. Moral, The use of x-ray fl uorescent spectroscopy to study the infl uence of cationic polymers on silicone oil deposition from shampoo, J. Cosmet. Sci., 52, 131–136 (2001). (13) H. M. Haake, H. La gr en, A. Brands, W. Eisfeld, and D. Melchior, Determination of the substantivity of emollients to human hair, J. Cosmet. Sci., 58, 443–450 (2007). (14) E. G. Gooch, Deter mi nation of traces of silicone defoamer in fruit juices by solvent extraction/atomic absorption spectroscopy, J. AOAC Int., 76, 581–583 (1993). (15) M. Sabo, J. Gross, a nd I. E. Rosenberg, Quantitation of dimethicone in lotions using Fourier transform infrared spectral subtraction, J. Soc. Cosmet. Chem. 35, 273–281 (1984). (16) A. Rohman, A. Musfi ro h, and E. G. Wijaya, Quantitative determination of simethicone in antacid sus- pension and chewable tablet using FTIR Spectroscopy, Global J. Pharmacol., 7, 270–275 (2013). (17) G. Torrado, A. Garcı a- Arieta, F. de los Rıos, J. C. Menendez, and S. Torrado, Quantitative determina- tion of dimethicone in commercial tablets and capsules by Fourier transform infrared spectroscopy and antifoaming activity test, J. Pharm. Biomed. Anal., 19, 285–292 (1999). (18) E. B. Walker, D. R. Dav ie s, and M. Campbell, Quantitative measurement of trans-fats by infrared spec- troscopy, J. Chem. Ed., 84, 1162–1164 (2007). (19) M. E. Miller, L. P. McK in non, and E. B. Walker, Quantitative measurement of metal chelation by Fou- rier transform infrared spectroscopy, Anal. Chem. Res., 6, 32–35 (2015). (20) Dimethicone Monograph, Un ited States Pharmacopeia/National Formulary, USP24/NF19, 2448– 2449 (2000). (21) “Silicones in Industria l Applications,” in Inorganic Polymers, R. De Jaeger and M. Gleria. Eds. (Nova Science Publishers, Hauppauge, NY, 2007), pp. 61–163. (22) V. Jankauskaitė, P. Narmo n tas, and A. Lazauskas, Control of polydimethylsiloxane surface hydrophobic- ity by plasma polymerized hexamethyldisilazane deposition, Coatings, 9, 36–43 (2019).