Abstract
A method for the determination of stachydrine in Herba leonuri by capillary electrophoresis with high frequency conductivity detection has been developed. The buffer medium and electrophoretic parameters were researched. The stachydrine in Herba leonuri could be separated and detected in phosphate buffer (2\^0 mmol/L of NaH\-2PO\-4, adjusted to pH=5\^0 by H\-3PO\-4) at 12\^0 kV of constant voltage (current of 12 μA). The linear concentration of stachydrine ranged from 20\^0 μg/mL to 1\^30 mg/mL (r=0\^993). The relative standard deviation (RSD) was 2\^10%, the limit of detection (LOD) reached 2\^5μg /mL, and the recovery was 97\^7%～98\^9%.
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Claims 5
Claim · model-written summary
Stachydrine in Herba leonuri could be separated and detected under the stated buffer and voltage conditions.
Verbatim
e0“The stachydrine in Herba leonuri could be separated and detected in phosphate buffer (2\^0 mmol/L of NaH\-2PO\-4, adjusted to pH=5\^0 by H\-3PO\-4) at 12\^0 kV of constant voltage (current of 12 μA).”
Claim · model-written summary
The method had a linear stachydrine concentration range from 20\^0 μg/mL to 1\^30 mg/mL, with r=0\^993.
Verbatim
e0“The linear concentration of stachydrine ranged from 20\^0 μg/mL to 1\^30 mg/mL (r=0\^993).”
t0“Herba leonuri”
Claim · model-written summary
The method relative standard deviation was 2\^10%.
Verbatim
e0“The relative standard deviation (RSD) was 2\^10%”
t0“Herba leonuri”
Claim · model-written summary
The method detection limit reached 2\^5μg /mL.
Verbatim
e0“the limit of detection (LOD) reached 2\^5μg /mL”
t0“Herba leonuri”
Claim · model-written summary
The method recovery was 97\^7%～98\^9%.
Verbatim
e0“the recovery was 97\^7%～98\^9%”
t0“Herba leonuri”