's Diagnostic:
GEL 28-30 is part of Fisher’s Diagnostic, a suite of tests used to help diagnose skin disorders. GEL 28-30 is the cationic transfer analysis, which tests for the presence of cations, or positively charged ions, in the skin. This analysis helps to identify certain skin conditions such as lupus erythematosus, scleredema, toxic epidermal necrolysis, and pemphigus vulgaris. The test identifies two components in the skin: free cations from the epidermal layer and bound cations from the dermal layer. By comparing the levels of cations in the two different layers, doctors can diagnose and treat these skin disorders.