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This article introduces the concept of chiral ion mobility spectrometry (CIMS) and presents examples demonstrating the gas-phase separation of enantiomers of a wide range of racemates including pharmaceuticals, amino acids, and carbohydrates. CIMS is similar to traditional ion mobility spectrometry, where gas-phase ions, when subjected to a potential(More)
The purpose of this study is to establish a model of transshipment port competition in order to understand container carriers' transshipment port selection. Accompanied by the enlargement of containership, the hub-and-spoke network is developed due to the economic consideration of containership routes. In between the feeder port and hub port, the production(More)
High-performance ion mobility spectrometry (HPIMS) with an electrospray ionization (ESI) source detected a series of food contaminants and additive compounds identified as critical to monitoring the safety of food samples. These compounds included twelve phthalate plasticizers, legal and illegal food and cosmetic dyes, and artificial sweeteners that were(More)
A commercially available electrospray ionization ion mobility spectrometer system is used to quantify the amount of nutritional supplements through direct introduction in solution phase. We investigated the general capability of this technique for the rapid screening of various nutritional supplements from unknown sources. Five nutritional supplements were(More)
High-performance ion mobility spectrometry (HPIMS) with electrospray ionization (ESI) has been used to separate drugs of abuse compounds as a function of drift time (ion mobility), which is based on their size, structural shape, and mass-to-charge. HPIMS has also been used to directly detect and identify a variety of the most commonly encountered illegal(More)
A novel analysis of explosives via the coupling of an airline passenger personnel portal with a high-flow (HF), high-resolution (HR) ion mobility spectrometry (IMS) was shown for the first time. The HF-HR-IMS utilized a novel ion aperture grid design with a (63)Ni ionization source while operating at ambient pressure in the positive ion mode at 200 degrees(More)
T reatment with IV tissue-type plasminogen activator is an effective treatment for acute ischemic stroke (AIS) within the first few hours of symptom onset. 1,2 Earlier treatment is associated with a higher likelihood of better outcomes. 3,4 This finding has led to national guidelines setting target door to treatment times at 60 minutes for eligible AIS(More)
For stricter drinking water regulations in the future, reducing the humic acid and disinfection byproducts in raw water, namely, trihalomethanes (THMs) and haloacetic acids (HAAs) is worthy for research. To investigate the removal of waterborne organic material using a lab-scale of bio-activated carbon filter under different EBCT, the concentrations of(More)
The mobilities of a set of common α-amino acids, four tetraalkylammonium ions, 2,4-dimethyl pyridine (2,4-lutidine), 2,6-di-tert-butyl pyridine (DTBP), and valinol were determined using electrospray ionization-ion mobility spectrometry-quadrupole mass spectrometry (ESI-IMS-QMS) while introducing 2-butanol into the buffer gas. The mobilities of the test(More)