| A rapid analytical method was developed for the determination of ibuprofen arginine by contactless conductivity detection with microfluidic chip.Influence parameters on separation and detection such as type and concentration of buffer,additive,separation voltage and injection time were investigated and optimized.Under the optimum conditions,i.e.20 mmol/L Tris-20 mmol/L H3BO3(pH 8.6)as buffer solution,no additive,a separation voltage of 2.0 kV and an injection time of 10.0 s,ibuprofen arginine could be separated and detected within 45.0 s.The results showed that good linearities for ibuprofen and arginine existed in 80.0-1.00×103 mg/L,with their correlation coefficients(r)of 0.998 and 0.997,respectively．The limits of detection(S/N=3)for them were 60 mg/L with RSDs of 1.9%and 1.8%，respectively.And their recoveries were in the ranges of 97.9%-103%and 97.3%-102%，respectively.This method was rapid and simple，and could be used for the detection and quality control of non-steroidal arginine ibuprofen anti-inflammatory drugs. |