Analysis Conditions

• Columns:
  ICSep ION-310 (6.5 x 150 mm),
  ICSep ORH-801 (6.5 x 300 mm),
  ICSep ION-300 (7.8 x 300 mm)
• Eluent: 0.002 N H₂SO₄
• Flow Rate: 0.5 mL/min
• Temperature: 35°C
• Detection: UV at 210 nm
• Injection: 20 µL

Sample Points

1. Maleic Acid (2 ppm)
2. Malic Acid (100 ppm)
3. Fumaric Acid (5 ppm)