新安江-海河模型在烟台市典型流域的径流模拟OA北大核心CSTPCD

Authors：张润庆;何蒙;姚成;姜会杰;李致家

Affiliations：烟台市水利局,山东烟台264000河海大学水文水资源学院,南京210098河海大学水文水资源学院,南京210098烟台市水文局,山东烟台264000河海大学水文水资源学院,南京210098

Subject：水利科学

Chinese Keywords:新安江-海河模型半湿润地区径流模拟Mann-Kendal检验烟台市

Journal Name：《南水北调与水利科技》 2020 (6)

High performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) was established to simultaneously determine nine prohibited alkaloids in cosmetics. Water was used as the sample dispersant, ammonia-methanol (2:98, V/V) was used as the extraction agent, and n-hexane was used to degrease to achieve one-step extraction AND purification. Separation was performed on a Poroshell 120 Bonus-RP column and gradient elution was performed with 0.2% formic acid in water-acetonitrile as the mobile phase. The mass spectrometry fragmentation mechanism of alkaloids was speculated by multiple reaction monitoring (MRM) mode in electrospray positive ion mode. The results showed that the linear relationship between the nine alkaloids in the corresponding concentration range was good, and the linear correlation coefficient R2 was 0.997 8~0.999 8. The detection limit and the limit of quantification of the method were 0.03?0.36 μg/kg and 0.1?1.2 μg/kg, respectively, and the recovery rate of the three spiked concentrations was 85.3%-135.3%, and the relative standard deviation was 1.0%-13.4%. The pretreatment of the method was simple and efficient, the measurement results were accurate and the sensitivity was high. It is suitable for the detection of prohibited alkaloids in cosmetics and the safety evaluation of cosmetics.降雨径流分布式水文模型中基于物理基础坡面和河道汇流模型及与实测水文资料同化研究

Page：78-84,7

Fund：国家重点研发计划(2018YFC1508103)国家自然科学基金(5197907051679061)

DOI：10.13476/j.cnki.nsbdqk.2020.0117