Synthesis of single-phase Au nanorods in an anodic aluminum oxide template with an optimized process for a highly sensitive and non-enzyme methyl mercaptan gas detector

Engineering an Enzymatic Cascade Catalytic Smartphone-Based Sensor for Onsite Visual Ratiometric Fluorescence–Colorimetric Dual-Mode Detection of Methyl Mercaptan

“…6−8 Based on these facts, it is of great significance to develop a precise, reliable, and efficient detection technique for reporting the fouling levels of CH 3 SH, expecting to establish an effective early warning mechanism for CH 3 SH, ultimately safeguarding environmental health. From this motivation, several analytical strategies including gas chromatography, 9,10 fluorescence, 11 electrochemistry, 12 chemiresistors, 13 and quartz crystal microbalance 14 have been established for reporting the fouling levels of CH 3 SH. Although the analytical parameters in these mentioned assays were acceptable, some drawbacks are also conspicuous, such as bulky instruments, complicated operation, and time-consuming pretreatment, failing to satisfy the demands of onsite analysis in environmental surveillance concerns, especially in an emergency case.…”

“…As a highly toxic and sulfur-containing volatile organic pollutant, methyl mercaptan (CH 3 SH) is widely produced in the processes of food processing, sewage, and solid waste treatments. − It has been reported that the exposure of CH 3 SH to air could be capable of yielding some climate problems such as photochemical smog and acid rain. , Moreover, owing to the degradation of sulfur amino acid, the methylation of sulfide, and the transfer of sulfhydryl, CH 3 SH could also be released from many food-related matrices such as cheese, meat-based products, bottled red wine, milk, etc., which could cause nausea, headache, and even the paralysis of the nervous system. − Based on these facts, it is of great significance to develop a precise, reliable, and efficient detection technique for reporting the fouling levels of CH 3 SH, expecting to establish an effective early warning mechanism for CH 3 SH, ultimately safeguarding environmental health. From this motivation, several analytical strategies including gas chromatography, , fluorescence, electrochemistry, chemiresistors, and quartz crystal microbalance have been established for reporting the fouling levels of CH 3 SH. Although the analytical parameters in these mentioned assays were acceptable, some drawbacks are also conspicuous, such as bulky instruments, complicated operation, and time-consuming pretreatment, failing to satisfy the demands of onsite analysis in environmental surveillance concerns, especially in an emergency case.…”

Visual Detection of Mercaptan Gases Using Silver Nanoparticles-Based Colorimetric Sensor Array

“…The calculated LODs for methyl mercaptan, ethyl mercaptan, and butanethiol were 80 ppb (Figure f), 28 ppb (Figure g), and 109 ppb (Figure h), respectively, and the LODs are also well below the threshold limit value 0.5 ppm of ACGIH permissible exposure. In addition, the comparison of experimental results with relevant literature data related to other nanomaterials − (Table S2) for the detection of mercaptan gases shows that the sensor array has excellent sensitivity to mercaptan gases, and the detection method was fast and more energy efficient.…”