ABSTRACT
Introduction 736
FDA Approved Category I UV Filters 736
Quality Control Procedures 737
Physical Analyses 737
Odor 737
Color 737
Physical Appearance 738
Melting Point 738
Refractive Index 738
Specific Gravity 738
Optical Rotation 738
Solubility 739
Moisture Determination 739
Viscosity 739
pH Determination 739
Flash Point 739
Chemical Analyses 739
Saponification Value 739
Acid Value 740
Functional Group Analysis 740
Metal Contents 740
Chromatographic Techniques 740
Gas Chromatography 740
High-Performance Liquid Chromatography 741
Spectroscopic Techniques 742
Ultraviolet Spectroscopy 742
Nuclear Magnetic Resonance Spectroscopy 744
Infrared Spectroscopy 745
Mass Spectrometry 746
Atomic Absorption and Emission Spectroscopy 747
Inductively Coupled Plasma 747
Conclusions 748
References 748
INTRODUCTION
The recent rapid growth of the sunscreen market reflects increased consumer
awareness concerning the protection against excessive exposure to the sun’s
damaging ultraviolet (UV) rays (this volume, chapters by Nelson and Diffey).
This large-scale introduction of UV filters into a multitude of cosmetic and
toiletry products has complicated the task of the quality control chemist.
