PENGGUNAAN SPEKTROFOTOMETER VISIBLE UNTUK UJI KADAR ASAM OKSALAT DARI BAYAM (Amaranthus) Visible Spectrophotometer Use for Testing Oxalic acid Content from Spinach (Amaranthus)

Abstract

Spectrophotometry is an analysis method based on measuring the absorption of monochromatic light by a row of colored solutions at specific wavelengths using a prism or a grating monochromator difriksi denagn fototube detector. Spinach is a kind of leaf vegetables that contain vitamins A, B, and C and other substances such as calcium and iron. Spinach contains iron in the form Fe 2+ (ferrous), if the spinach too long interact with O2 (Oxygen), the content of Fe 3+ (Ferri). Oxalic acid is a chemical compound having the formula H2C2O4 In the determination of Oxalic Acid with different variables obtained solvent concentration levels of 1.960% respectively; 1.965%; 1,980%; 1,988%, 1,999% with a variable ratio of solvent extract and 1:1,1: 2,1:3,1:4 and 1:5. It can be concluded that the more solvent used the variable displacement greater energy thus produced greater levels. the systematic name etanadioat acid. The simplest dicarboxylic acid is commonly described by the formula HOOC-COOH. In the lab variable 2 with a concentration of 100 ppm with a temperature of 60 0C, 70 0C, 80 0C, 90 0C and 100 0C obtained levels of 1,999%; 1.998%; 1.985%; 1,980%, 1,977%. It can be concluded that the higher the temperature used, the higher the Oxalic Acid extract that can be extracted. Kata kunci : Spectrophotometry, Spinach, Oxalic Acid