Multifunctional microchip-based distillation apparatus II - Aerated distillation for sulfur dioxide detection

Recent Advances in Microfluidic Devices for Contamination Detection and Quality Inspection of Milk

“…For example, whole blood analysis and diagnosis tests usually require only centrifugation to separate the blood cells and plasma for detection [ 30 ]. By contrast, when detecting acidic preservatives in food samples, for example, it is necessary to homogenize the sample first and then extract the test substance by steam distillation before detection can be performed [ 31 , 32 ]. As a result, sample processing in traditional food detection methods usually involves a high cost, a long process, and the use of multiple equipment.…”

Detection and discrimination of sulfur dioxide using a colorimetric sensor array

“…In particular, in addition to TCM, it has been reported that the sulfur-fumigation process has been illegally used in many foods and food ingredients (e.g., star anise, pepper, wolerry, ginger, fungus and tremella). 10,14 Currently, the pharmacopoeias and food laws of many countries and regions have stipulated the limits of sulfur dioxide residues and recommended a variety of detection methods for sulfur dioxide residue, such as spectrophotometry, 15 acid-base titration, 16 uorescence method, 17,18 gas chromatography-mass spectrometry, 19 high-performance liquid chromatography, 20 electrochemical analysis, 21 enzyme-linked immunosorbent assays 22 and Fourier-transform infrared spectroscopy. 23 Although the above-mentioned means exhibit high sensitivity and selectivity, their popularization and application are generally limited by high costs, unfriendly portability, complex sample pretreatment, and specialized technical training in some developing countries and regions.…”