AN138: Determination of Thiosulfate in Refinery and Other Wastewaters

Instrument Type: IC

Natural gas can contain hydrogen sulfide (H2S) and carbon dioxide (CO2). These gases are corrosive and must be removed before the natural gas is fed into pipelines. This is usually accomplished by treating the gas with an amine solution. Anions introduced during this process can form heat-stable salts with the amine. Thiosulfate and sulfate are two anions commonly found in these solutions. This Application Note shows that thiosulfate can be determined in refinery and other waste waters using an IonPac AS16 column, EG40-generated eluent gradients, and suppressed conductivity detection.