In short
GC-MS separates the volatile components of a mixture and gives data for identifying them, so it is the standard way to investigate what is in a natural oil or fragrance. The reference guide explains how it works and how to commission it. This study guide prepares you to ask the right questions. You do not need an instrument, and independent learners generally pay an analyst.
What you will learn
- Describe what each part of GC-MS does
- List what a report can and cannot tell you
Before this lesson: Discoloration Chemistry
What to look for as you read
- What the column does and what the mass spectrometer does.
- Why amounts on a report are not the same as odor impact.
- What the guide says about limits, and how much a report costs you in follow-up.
Practical exercise: Write your questions for an analyst
- Choose a question you would really want answered, such as "Is this oil adulterated?" or "What is in my competitor's perfume?"
- Write what a GC-MS report could contribute to it, and what it could not.
- List at least five questions to ask an analyst, including column type, whether identifications were confirmed, how amounts were calculated and what they might miss.
- Note any legal or ethical issue with your question, such as trade secrets or claims about someone else's product.
You have done this well if your list would help you judge a real report. The next lesson gives you one to read.
Knowledge check
Written and reviewed by the RUŌOD Lab team. This is general education, not legal, regulatory, medical or safety advice. Example dilutions and exercises are for learning, are not validated products, and have not been safety-assessed. Completing a lesson confers no qualification. How we check these lessons.