1.1 Sample Processing

Weigh an appropriate amount of sample and place it in an oxygen bomb containing an appropriate amount of absorbing solution. Perform oxygen replacement three times, ignite, and absorb for thirty minutes. During this period, shake carefully several times to ensure sufficient absorption. Prepare the solution and test it on the machine.

1.2 Experimental section

(1) Instruments and reagents

YC3000 ion chromatograph, deaerator, high-performance anion chromatography column, ASCD anion suppression conductivity cell

Sodium Carbonate, Sodium Bicarbonate (Premium Pure, Kemio Reagent Co., Ltd.)

Sodium sulfate (high-purity)

(2) Test conditions

Rinse solution 2.7mM Na2CO3: 2.7mM NaHCO3, flow rate 1.0mL/min, column pressure 3.8MPa, room temperature, conductivity 39, current 67mA.