Spectrometers
XRF Coating Thickness Measurement: How It Works and What Affects Accuracy
XRF coating thickness measurement is used to determine the thickness of a coating. You’ll find it in plating QC, electronic component tests, precision part analysis. No cut, no probe marks. When the material mix and arrangement is suitable, XRF tests the part without damage. But to detect an element is one thing. Another is obtaining accurate…
UV-VIS Spectrometry for Protein Concentration Analysis: Methods, Accuracy & Tips
Measuring protein concentration is something that always pops up – purifying proteins, doing biological studies, routine monitoring of lab samples. The concentration of this can be found by measuring how much ultraviolet light the sample absorbs at a certain wavelength. This can be done using a UV-Vis spectrophotometer. That stated, what you really obtain depends…
What Happens When a Flame Photometer Sample Is Too Concentrated?
You run a sample, and the reading comes back higher than your top standard. Or it looks fine, but the number just doesn’t feel right. In flame photometry, a sample that is too concentrated is one of the most common reasons results go off track. This matters because a flame photometer only gives reliable numbers…
How Accurate Is XRF Analysis? 7 Key Factors That Affect Accuracy
How accurate is XRF analysis? XRF analysis can provide reliable results for many elemental analysis tasks, but there is no fixed accuracy value that applies to all samples and all applications. Actual accuracy is affected by factors such as sample type, element concentration, matrix effects, sample preparation, calibration method, instrument configuration, and measurement conditions. Therefore, when…
How Does a Bomb Calorimeter Work? Working Principle Explained
How does a bomb calorimeter work? A bomb calorimeter determines the heat of combustion and calorific value of a sample by burning a weighed sample in excess oxygen inside a sealed oxygen bomb and measuring the temperature rise of the surrounding water caused by the heat released during combustion. The entire measurement process can be…
Why Is Digestion Needed for AAS Sample Preparation? A Practical Guide
If you ever get unexpected results from your AAS analysis and don’t know why, the first place to investigate is often sample preparation. Much of the problem can come down to one often-overlooked step: digestion. The instrument is only part of the process; getting the sample into a suitable form for analysis is just as…
FTIR vs Raman: 7 Key Differences & How to Choose
FTIR vs Raman. The comparison centers on detection. Each technique reads molecular vibrations in its own way. Fit to the sample and analytical goal varies. FTIR measures infrared absorption. Raman measures inelastic scattering. Two spectroscopic techniques. Different physical mechanisms. They probe molecular structure from complementary angles. Not replacements. In practical analytical work, the choice depends on…
Flame AAS vs Graphite Furnace AAS: 7 Key Differences
lThe main difference between flame AAS vs graphite furnace AAS is driven by a practical balance. Speed, sensitivity, sample size, workload. Those four factors set the choice. Flame AAS, or FAAS, favors speed and sample throughput. Routine element analysis, samples at relatively higher concentrations, that is where FAAS fits. Graphite Furnace AAS, or GFAAS, offers higher…
AAS Calibration: 7 Steps to Build a Calibration Curve
AAS calibration is the process of establishing and verifying the relationship between analytical signal and analyte concentration, while an AAS calibration curve is used to quantify unknown samples within the applicable working range. A well controlled calibration process is essential for obtaining reliable quantitative results. Problems during calibration can affect the accuracy and comparability of subsequent sample measurements….
Why Does the Same Sample Give Different FTIR Spectra? 5 Common Causes
You do an FTIR analysis and then do it again on the same sample a few minutes later and the two spectra seem considerably different. The peaks shift, the baseline slopes change or a band you weren’t expecting all of a sudden arrives. If this has happened to you, you are not the only one….
Browse by category:
