Effect of Pretreatment of Mineral Water (SI-90 4E)
Sample : Mineral water (Water)
2. 6.7mg/L Cl-
3. 4.4mg/L NO3-
4. 12mg/L SO42-
Column : Shodex IC SI-90 4E (4.0mmID*250mm) Eluent : *5mM p-hydroxbenzoic acid(pH8.2 ajusted by N,N-diethylethanolamine) Flow rate : 1.5mL/min Detector : Non-suppressed conductivity Column temp. : 25°C(Room temp.)*Add 0.69g of p-hydroxybenzoic acid in 1L messflask and fill pure water to approximately 90mL Add 720micro-L of N,N-diethylethanolamine followed by supesonification to complete dissolution. Fill water to 1L and use as the eluent after filtration.