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Analisis kadar kation dan anion pada air injeksi telah dilakukan. Metode yang digunakan adalah metode titrasi. Hasil pengujian diperoleh kadar Ca 2+ 92,18 mg/L, kadar Mg 2+ 34,03 mg/L, kadar HCO 31627,20 mg/L, kadar SO4 296,07 mg/L, dan kadar Cl 6402,27 mg/L. Selain itu air injeksi mengandung CO2 bebas sebesar 49 mg/L. Berdasarkan hasil pengujian air injeksi mengandung kation yaitu Ca 2+ , Mg 2+ dan anion Cl , SO4 2, dan HCO 3.

PENENTUAN KADAR KATION DAN ANION PADA AIR INJEKSI DI WTIP (Water Treatment Injection Plant) PT.PERTAMINA EP ASSET 1 RANTAU FIELD