Search

A novel method of ultra high-pressure liquid chromatography coupled with mass spectrometry (UHPLC-MS) was developed for the quantitative analysis of 18 major bioactive components from Huangqi decoction (HQD). HQD is a classic traditional Chinese medicine (TCM) commonly used to treat consumptive and chronic liver diseases. Chromatographic separation was performed on a reverse-phase C18column for 30 min at a flow rate of 1 mL min−1. The optimum mobile phase for the gradient elution was 0.05% aqueous formic acid and acetonitrile. All of the analytes showed good linearity over the tested concentration ranges (r2> 0.9972). The recoveries of the three concentration levels ranged from 91.14% to 106.21% with relative standard deviation (RSD) less than 4.69%. Intra- and inter-day precisions were less than 4.73% and 4.97%, respectively. Moreover, this method was successfully used to determine the content of HQD extracts in three different batches. Hence, this method could be used for the multi-component quality control of HQD.

A novel solar-powered hybrid energy system with cooling and heating is presented, which consists of an adsorption ice maker subsystem and water heater subsystem. It can be used as an ice maker and water heater hybrid system or a single water heater respectively according to incident solar radiation intensity. A numerical model is developed to predict the performances of the hybrid energy system. Performance simulation and analysis on the hybrid energy system have been made. Simulation results show that, under the climatic conditions of daily solar radiation being about 12-20MJ/m2, the hybrid energy system can be used as an ice maker and a water heater effectively, its daily solar cooling COP (coefficient of performance) is about 0.173 - 0.181, the daily heating coefficient of performance is about 0.294-0.327.