Development of a deep-sea chemical analyzer for in-situ anion measurement

This paper designs an undersea in-situ anion analyzer that could work in the depth of 4000 meters. Based on the method of ion chromatography, the device detects the concentrations of F
^-
, Cl
^-
, Br
^-
, NO
₃
^-
, SO
₄
^2-
, PO
₄
^3-
etc. The analyzer consists of there major parts: a pressure housing containing the control unit, an oil-filled housing containing the fluid analysis part and a peristaltic pump for transferring seawater and elution, and it has functions of in-situ calibration and seawater dilution. The system performed successfully in a serious of experiments.