Vitamin A (Retinol) and Vitamin E (Tocopherol) are fat-soluble vitamins, which can be stored for longer periods in the adipose tissue. Vitamin A is also known as retinol because it produces the pigments in the retina of the eye. It is essential for the visual process and recovers the skin and mucosa. A lack of Vitamin A will reduce visual power up to total blindness. An excess of Vitamin A can cause headache, skin damage, liver disease, painful alterations of the skeleton, and fetal damage.

Vitamin E (Tocopherol) is an antioxidant agent and protects unsaturated fatty acids against oxidation. It also protects the cells of the body by catching radicals. A lack of vitamin E in animal experiments demonstrates diseases of the muscles, nervous system, heart, liver, and reproduction system. These symptoms were not observed in humans. Vitamin E can be stored in the adipose tissue in large amounts. A lack can be caused by a malfunction in digestion or absorption of fatty acids.


VIT A/E by HPLC is a kit for the  determination of Vitamin A (Retinol) and Vitamin E (Tocopherol) in serum by HPLC, for the diagnosis of vitamin deficiency. This assay allows for simultaneous determination of Vitamins A and E in a single run.


Technical Specifications:


Principle:                                          Isocratic HPLC (Reversed Phase)


Duration of  the chromatography:   7 minutes


Sample volume:                               200 µL di siero o plasma


Flow rate:                                         0.6 mL/min


Detection:                                         UV-Vis UV 325 nm (Vitamin A), 285 nm (Vitamin E)





Linearity:                     up to 2 mg/L (Vit A) e sino a  50 mg/L (Vit E)


Detection Limit:           up to 5 ug/L (Vit A) e sino a 0,5 mg/L (Vit E)



Vit A

Vit E




CV (%) Intra batch



 CV (%) Inter batch