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[Objective]To establish a method for determination of the content of the metal cations in Polygonum aviculare. [Methods]High-performance capillary electrophoresis was used,with uncoated fused-silica capillary (50μm i. d. × 50 cm,46 cm to detector) ,and the running buffer was 7 mmol/L imidazole and 6 mmol/L tartaric acid (pH = 6. 0) ,and the separation voltage was 20 kV,and the electrokinetic injection time was 3 s at the voltage of 15 kV,and the detection wavelength was 214 nm. [Results] The concentration of K+ ,Na+ ,Mg2+ , Mn2 + ,Ca2+ and Zn2+ showed a good linear relationship with their peak height in the range of 0. 5 120 mg/L (r = 0. 999 3) ,0. 5 120 mg/L (r =0.998 7) ,0.1 -60 mg/L (r =0.997 3) ,0. 1 -120 mg/L (r =0. 999 2) ,0. 1-60 mg/L (r =0. 999 1) and 0. 5-120 mg/L (r = 0. 998 2) ; the average recovery of K+ ,Na+ ,Mg2 + ,Ca2+ ,Zn2+ were 103. 5% ,96% ,93. 4% ,105. 4% and 101. 6% ,and the RSD were 1. 75% ,1. 66% ,1. 52% ,1. 43% and 1. 19% (n = 6) . [Conclusion]The method is simple,rapid,accurate,reliable,and can be used for determination of metal cations content in Polygonum aviculare.
[Methods] To establish a method for determination of the content of the metal cations in Polygonum aviculare. [Methods] High-performance capillary electrophoresis was used, with uncoated fused-silica capillary (50 μm id × 50 cm, 46 cm to detector) and the running buffer was 7 mmol / L imidazole and 6 mmol / L tartaric acid (pH = 6.0), and the separation voltage was 20 kV, and the electrokinetic injection time was 3 s at the voltage of 15 kV, and the The results were as follows: detection wavelength was 214 nm. [Results] The concentration of K +, Na +, Mg2 +, Mn2 +, Ca2 + and Zn2 + showed a good linear relationship with their peak height in the range of 0. 5 120 mg / L (R = 0.998 7), 0.1-60 mg / L (r = 0.997 3), 0.1-120 mg / L (r = 0.9992), 0.1 The average recovery of K +, Na +, Mg2 +, Ca2 +, Zn2 + were 103.5% -60 mg / L (r = 0.9999) and 0. 5-120 mg / , 96%, 93.4%, 105.4% and 101.6%, and the RSD were 1.75%, 1.66%, 1.52%, 1.43% and 1.19% (n = 6). [Conclusion] The method is sim ple, rapid, accurate, reliable, and can be used for determination of metal cations content in Polygonum aviculare.