A method for the determination of seven kinds of thiocarbamate herbicides, molinate, pebulate, vernolate, triallate, thibencarb, eradicane and butylate in black tea and green tea has been developed. After homogenization, 2.0 g tea sample was soaked with 6 mL water for 1 h. 2.5 g NaCl was then added, and the sample was extracted twice by 20 mL acetonitrile. After concentration, the extract was put through HLB column and eluted by 3 mL acetonitrile. The eluate was then concentrated and dissolved with 2.0 mL hexane-acetone (7∶ 3, V/V) mixture. The preparation was cleaned by Envi-Carb column and eluted with 5 mL hexane-acetone. After concentration, the residue was dissolved by acetonitrile-water (5∶ 5, V/V) solution. Detection was achieved by electrospray ionization(ESI) in positive mode using multiple reaction monitoring. D_3-carbaryl was used as the internal standard, the linear range for the herbicides was 0-200 μg/L and the limit of detection were from 0.093 to 1.77 μg/L, with the correlation coefficients(r) varying from 0.9954 to 0.9988. The recoveries of all thiocarbamate herbicides were from 77.3% to 91.5% at the spiked levels of 5-20 μg/kg. The RSD of each compound was less than 15%. Black tea and green tea samples were successfully analyzed by the proposed method with satisfactory results.

Objective:To investigate the value of real-time shear wave elastography (SWE) in the assessment of splenic congestion in patients with chronic right heart failure.Methods:Sixty patients with chronic right heart failure with cardiac function grade Ⅱ-Ⅳ of New York Heart Association (NYHA) treated in Lianyungang First People′s Hospital from March 2020 to February 2021 were collected as the study group, and 20 healthy subjects in the same period were selected as the control group. Routine echocardiography was performed on all subjects; spleen stiffness measurement (SSM) was detected by SWE, and blood biochemical indicators related to patients with right heart failure were detected and recorded. SSM and other related parameters between the two groups were analyzed; the SSM in patients of different cardiac function classifications and course of disease were compared; 60 patients were divided into low SSM group (SSM≤15.0 kPa), middle SSM group (15.0 kPa