Hemoglobin can be measured manually using a spectrophotometer or colorimeter. Bathochromic shift is typically demonstrated using a spectrophotometer, colorimeter, or spectroradiometer. Where a colorant contains fluorescence, a bi-spectral fluorescent spectrophotometer is used. Two types of photometers are used&colon; spectrophotometer and filter photometer. The test may be performed as a quantitative colorimetric test using a spectrophotometer. He did his experiments with the newly developed paper chromatography and ultraviolet spectrophotometer. Usually, the detector used is a non-dispersive infrared spectrophotometer. Winemakers can track the progression of malolactic fermentation by paper chromatography or with a spectrophotometer. Some GC-MS-NMR are connected to an infrared spectrophotometer which acts as a backup detector. This method requires a spectrophotometer capable of measuring in the UV region with quartz cuvettes. This measurement is done with a spectrophotometer. Bittering units are measured through the use of a spectrophotometer and solvent extraction. This leads to a colour change, which can be measured using a spectrophotometer. Gemological laboratories make use of spectrophotometer machines that can distinguish natural, artificial, and color-enhanced diamonds. A UV-Vis spectrophotometer will do all this automatically.