This paper described that there were two or more endpoints in the curve when potentiometeric titration[1] was used to determine the contents of mercaptan sulfur
This paper described a simple method to separate and identify the nitrogen compounds in RFCC diesel oil. A 2% H2SO4 - CH3CH2OH solution was used to extract nitro
color reactions are used to determine ruthenium utilizing spectrophotometer, but the process need high temperature, long time pyrogenation and miscellaneous ext
Although the caustic sulfur components in LPG have been removed, the process converted the result of copper strip corrosion test from passing into failing somet