Search

AbstractThis study presents a novel approach for the simultaneous identification and quantification of extractable chlorinated organic carriers (COCs) from diverse materials, including textiles, foam and leather. COCs, valued for chemical synthesis, dye transfer and solvents for dye formulations. In this work, dichloromethane under ultrasonic conditions at 25 °C for 30 minutes was employed for the extraction of COCs. Gas chromatography mass spectrometry (GC-MS) utilizing a DB-5MS column facilitated the separation and detection of target analytes. SIM ionization mode was utilized with target and qualifier ions for detection. Optimization of parameters such as extractant type, extraction method, and time resulted in high recoveries ranging from 95% to 105%. The calibration curve exhibited a range of 5 to 120 ng mL−1 with regression values of 0.996–0.998. The method demonstrated excellent precision with relative standard deviations (RSD) below 10% for test specimens and for pure standards. Limits of detection (LODs) was below 0.1 ng mL−1, indicating high sensitivity. Application of the developed method to real specimens successfully detected COCs at concentrations ranging from 2.60 to 9.94 ng mL−1, affirming its effectiveness in environmental monitoring and risk assessment. [ABSTRACT FROM AUTHOR]

[Objective] In order to explore the extraction technology of polysaccharide from Lentinula edodes and Morchella esculenta in Shangluo. [Method]Polysaccharides were extracted from Lentinula edodes and Morchella esculenta in Shangnan County by ultrasonic assisted hot water extraction. Through single factor experiment, the effects of solid-liquid ratio, ultrasonic time, ultrasonic temperature and hot water extraction temperature on the extraction rate of Lentinula edodes and Morchella esculenta were compared. The orthogonal experiment was designed to obtain the optimum extraction process of Lentinula edodes and Morchella esculenta by ultrasonic-assisted hot water extraction. [Result] The results showed that the extraction rate of lentinan was the highest under the conditions of solid-liquid ratio 1 ∶ 60, ultrasonic time 30 min, ultrasonic temperature 40 ℃ and extraction temperature 60 ℃ . Under the conditions of solid-liquid ratio of 1 ∶ 50, ultrasonic time of 20 min, ultrasonic temperature of 40 ℃ and extraction temperature of 50 ℃, the extraction rate of polysaccharide from M. esculenta was the highest. [Conclusion]Ultrasonic assisted hot water extraction of Lentinula edodes and Morchella esculenta polysaccharide is a feasible, effective, economical extraction method. [ABSTRACT FROM AUTHOR]