Class 1 (Chief Engineer) Engineering Management 📅 Mar 2023

Exam Question

With reference to the modern analysis techniques employed for the condition analysis of Lubricating Oil, briefly discuss following

(a) Elemental (Spectrometric) Analysis (4)

(b) Fourier Transform Infrared (FTIR) Spectroscopy (4)

(d) Base Number Vs Acid Number. (4)

Reference Answer

### (a) Elemental (Spectrometric) Analysis
Elemental analysis, also referred to as Spectrometric Analysis, is a quantitative technique used to determine the concentration of individual metallic elements within a used lubricating oil sample. The results are typically expressed in parts per million (ppm). This analysis provides critical insight into component wear rates, sources of contamination, and the depletion of metallic additives.
**Principle of Operation:**
The analysis is commonly performed using Inductively Coupled Plasma (ICP) or Atomic Absorption Spectroscopy (AAS).

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