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Questions related from Daniel Setiyo Nugroho
I regularly doing ATR-FTIR analysis from several mineral oil and surfactant, lately i discover a strange and unknown peak appear (1000-1300 cm-1) which is not belong to the material absorbance...
11 November 2021 7,261 7 View
I face a difficulties to identify Paraffinic Mineral oil and PAO base oil, from both of the FTIR spectra shows similar peak and absorbances intensity. Is there any convenient way to distinguish it?
07 September 2021 4,554 2 View
I do a microbe culture from waste metalworking fluid using blood agar medium at 37C, and I found a colony as like as the picture in the attachment. Any one can help me to figure out what is...
18 March 2021 5,784 7 View
During my trial for lubricant oil re-refinery process, I use NaOH as coagulant agent. After overnight of gravity settling, a solid layer in the surface was form. what product is that? since the...
23 February 2021 2,334 4 View
