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Figure S1. Wiring diagram of the high-voltage power supply module.

Figure S2. (A) Electropherograms of FITC-labeled amine acids at different removing speeds. (B) The effects of removing speed in the range of 10 to 1000 mm/min on separation efficiency of arginine, FITC, sodium fluorescein and phenylalanine. Conditions: tapered-tip coated capillary, 1.5-cm effective length, 50-μm i.d.; removing angle of sample well, 0°; separation field strength, 400 V/cm; working electrolyte, 5 mM borate buffer (pH 9.2).

Figure S3. (A) Electropherograms of FITC-labeled amine acids at different electric field strengths. (B) The effects of electric field strength on separation efficiency of arginine, FITC, sodium fluorescein and phenylalanine. Conditions: tapered-tip coated capillary, 1.5-cm effective length, 50-μm i.d.; removing angle of sample well, 0°; removing speed, 1000 mm/min; working electrolyte, 5 mM borate buffer (pH 9.2).

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