ASTM D3230 Salts In Crude Oil

KN-3230 Salt Content of Crude Oil Tester

Overview
    KN-3230 Salt Content of Crude Oil Tester conforms to ASTM D3230 Standard Test Method for Salts in Crude Oil (Electrometric Method), it is suitable for the approximate chloride (salts) concentration in crude oil. The range of concentration covered is 0 to 500mg/kg or 0 to 150lb/1000bbl as chloride concentration/volume of crude oil. KN-3230 is suitable for measuring the salt content to detect the total halide value of which the range is 0.002~0.02%(weight) in the crude oil, reduced oil, cracking oil residue and fuel oil, it is also suitable for estimating the seawater pollution situation of the used team turbine oil and bunker fuel oil.

 Working Principle
In the presence of polar solvent, the crude oil is heated. Use water to extract the salt of it. After centrifugal separation, inject some sample with a certain concentration into the cell. The Cl- and Ag+ react as follow：

Ag++ Cl-  → AgCl

Electrolytic anode electroproduce titrant Ag+ to supplement the wasting Ag+, till the concentration of the titrant return to previous concentration, measure the electric quantity of supplement the wasting Ag+, According to Faraday’s law to get the salt content of the sample

    M×Q
W = ————
    n×F

W---- Precipitated substance weight
M----Molecular weight or Atomic weight
Q----Electric quantity
n----Electron transfer number of electrode reaction
F----Faraday constant 96500

Technical parameters
1． Measuring range：
      Salt content：0.2~10000mgNaCl/L
      Inorganic chloridion：0.1ppm~percentage composition
2． Measuring accuracy：
      ≤  1mg/L Absolute deviation：±0.2mg/L
     ＞ 1mg/L Relative deviation：±10%
3． Sample volume： 1g±0.2g