Day 3 - Analysis of EDS - Duscher

Value of the Information & Strength of the Argument

The lecture provides valuable practical insights into EDS quantification, demonstrating a systematic approach to peak identification and fitting. The argumentation is solid, based on physical principles and practical experience. The instructor clearly explains the rationale behind each step, such as why fitting whole families of peaks is more robust than fitting single peaks, and why absorption correction is necessary. He also acknowledges limitations and uncertainties, such as the inaccuracy of standardless K-factors and the need for iterative correction. The use of a real example (strontium titanate) and a fun example (chocolate) helps illustrate the concepts. The interactive nature of the session, with questions from participants, adds to the value by addressing common pitfalls.

Scientific Rigor, Source Quality, Title Accuracy

The lecture demonstrates scientific rigor by referencing established methods and sources, such as EM tables for K-factors and the concept of absorption correction. The instructor mentions that EM tables are based on published work and are among the best standardless options. He also discusses the importance of calibration standards from NIST. The title accurately reflects the content, as it is a lecture on EDS analysis. The content is technically detailed and appropriate for an audience with some background in electron microscopy. The instructor’s expertise is evident, and he is transparent about the limitations and potential errors in the methods.

The title accurately reflects the content: a lecture on EDS analysis, part of a series.

7/10

The lecture is a practical tutorial by an expert in the field, demonstrating a specific workflow for EDS quantification. It includes references to established methods (K-factors, absorption correction) and mentions sources like EM tables. However, it is a single expert's perspective without peer review or external validation, and some parts are based on personal experience.

Markers derived by PSI from the transcript: the creator did not define chapters.

• 00:00Introduction to the lecture and the use of Google Colab for EDS analysis.
• 02:00Opening an EDS file and displaying the spectrum.
• 05:00Identifying elements by iteratively subtracting the strongest peaks.
• 10:00Fitting the background and families of peaks.
• 15:00Quantification using K-factors and comparison of standardless vs. manufacturer K-factors.
• 20:00Absorption correction and estimation of sample thickness.
• 25:00Discussion on the accuracy of quantification and the importance of checking the fit.
• 30:00Example of analyzing a chocolate sample in SEM.
• 35:00Explanation of K-factors and calibration standards.
• 40:00Conclusion and summary of key points.

• EM tables — Mentioned as a source for calculated K-factors.

• EM tables — The instructor references EM tables as a source for calculated K-factors, which is consistent with the content.