The comparison of optical properties for commercial beer glass bottles

Abstract

Four brands of beer bottles (green (G1, G2) and brown (B1, B2)) were examined for thickness using a micrometer. X- ray diffraction study (X- ray Diffractometer (XRD) ) confirmed the amorphous nature of the samples. The analysis elements in the samples were determined using X- ray fluorescence spectrometry (XRF). The reflection, transmission and absorption of the samples were investigated using a Shimadzu UV- 3600 Spectrophotometer. Inspection revealed that sample B1 glass bottles had the highest reflectance and lowest transmittance. In addition, the absorption curves of the green samples ( G1 and G2) showed absorption peaks at 448 and 657 nm and a wavelength band of 1098 nm for the brown glass bottle sample ( B1 and B2) . Examination of the B1 brown glass bottle has higher reflectance and lower transmittance. It can be concluded that the B1 brown glass bottle has more protection from solar radiation than the green G1, G2 and B2 brown glass bottles, which affects the flavor inside the bottle.