Abstract: A method of screening new psychoactive substance is provided, including providing a sample; placing the sample on chromatographic paper; ionizing the sample on the chromatographic paper by a direct analysis in real time (DART); performing a mass spectrometry analysis on the ionized sample to obtain a sample mass spectrum; and comparing a known standard mass spectrum with the sample mass spectrum, in which when a profile of the known standard mass spectrum is the same as a profile of the sample mass spectrum and the known standard mass spectrum is not exactly the same as the sample mass spectrum, the sample is determined to be the new psychoactive substance. A platform for screening new psychoactive substance is also provided to quickly screen out the new psychoactive substance.

Abstract: The present disclosure provides a method for detecting short-chain fatty acids in biological samples, including a derivatizing step, a loading step and a detecting step. The derivatizing step includes treating the short-chain fatty acids in the biological sample with 2-nitrophenylhydrazine for derivatizing the short-chain fatty acids into a sample to be detected. The loading step includes loading the sample onto a paper carrier. The detecting step includes analyzing the sample loaded onto the paper carrier by direct analysis in real time mass spectrometry for obtaining a detection result. The method provided by the present disclosure may complete the analysis of the biological sample within a short period of time and achieve a quantitative result comparable to that obtained by conventional chromatographic approaches.

Abstract: A method and system for opportunistically picking order items during decant processes. An order management system determines which items required for a pending order are depleted within a decant function or storage system and orders replenishment, such as inbound vendor cases containing the depleted required items, to the decant function. Operators at decant workstations pick the required items from the inbound vendor cases into order containers while simultaneously decanting any remaining, non-required vendor items into inventory containers. The order containers and the inventory items are stored in a storage system until all required items for an order are present therein. Once all required items are present, the items are released to a downstream picking workstation, sorter, and/or packing station. The method with opportunistic decant may enable minimized facility space requirements, labor reductions, and resource reductions while improving facility throughput.