Technique | Subject | Question | |
Particle Sizing/Counting | Water soluble samples | How are water-soluble samples analyzed on the SediGraph? | /Library/FAQs/Water-Soluble-Samples.aspx |
Mercury Porosimetry | Consumption of mercury | How can I minimize the quantity of mercury consumed by the mercury porosimeter? | /Library/FAQs/Consumption-of-Mercury.aspx |
Physical Adsorption | Refilling the dewar during analysis | How can the dewar on the Gemini be refilled during a long analysis? | /Library/FAQs/Refilling-the-Dewar.aspx |
Particle Sizing/Counting | Dispersing Samples | How do I confirm before analysis that the proper liquid has been selected for the sample? | /Library/FAQs/Dispersing-Samples.aspx |
Physical Adsorption | When to measure free space | How do I know when to enter a value for free space, or have the free space measured? | /Library/FAQs/When-to-Measure-Free-Space.aspx |
Particle Sizing/Counting | Particle size distributions of magnetized particles | How does one determine the particle size distribution of magnetic particles? | /Library/FAQs/Particle-Size-Distributions.aspx |
Physical Adsorption | Transferring sample from degas port to analysis port | How is a sample moved from the degas port to the analysis port without incurring contamination? | /Library/FAQs/Transferring-Sample-from-Degas-Port.aspx |
Pycnometry | Sample Size | I need an instrument to measure accurately the volume of small parts; can the AccuPyc 1330 do this? What are the size and shape restrictions on the sample? | /Library/FAQs/Size-and-Shape-Restrictions.aspx |
Physical Adsorption | Micropore plots and their meanings | In the micropore program, what are the differences between the data reduction methods? What plots are recommended, cumulative or differential? | /Library/FAQs/Micropore-Plots.aspx |
Physical Adsorption | Meaning of "Analysis Conditions Modified During Analysis" | The statement, "Analysis Conditions Modified During Analysis" sometimes appears on the report. What does this mean? | /Library/FAQs/Analysis-Conditions-Modified-During-Analysis.aspx |
Mercury Porosimetry | Meaning of intrusion curve | What does the intrusion versus diameter curve indicate to me about my sample? | /Library/FAQs/Meaning-of-Intrusion-Curve.aspx |
Pycnometry | Equilibration rate | What is "equilibration rate" and how do I optimize the parameter on the AccuPyc 1330? | /Library/FAQs/Equilibration-Rate.aspx |
Pycnometry | Density and Specific Gravity | What is the difference between density (as measured by the pycnometers) and specific gravity? | /Library/FAQs/Density-vs-Specific-Gravity.aspx |
Physical Adsorption | Differences between surface preparation by vacuum, flowing gas, and heat. | What is the difference between preparing sample surfaces by vacuum drying, and flowing gas with or without heat? | /Library/FAQs/Differences-Between-Surface-Preparation.aspx |
Particle Sizing/Counting | Entering the correct particle density value | What is the effect of having a minor error in the entered value of particle density? | /Library/FAQs/Correct-Particle-Density-Value.aspx |
Chemical Adsorption | Heat of Adsorption | What is the heat of adsorption and can it be determined with the ASAP 2010-C? If so, how? | /Library/FAQs/Heat-of-Adsorption.aspx |
Physical Adsorption | Sample surface preparation when the sample molecules themselves contain water. | What is the most effective method of degassing samples that contain water molecules in their crystal latice (not adsorbed water)? | /Library/FAQs/Sample-Surface-Preparation-.aspx |
Mercury Porosimetry | Required Purity of Mercury | What purity of mercury is required for the mercury porosimeters? | /Library/FAQs/Required-Purity-of-Mercury.aspx |
Physical Adsorption | Micropore definition | What size range defines a micropore? | /Library/FAQs/Micropore-Definition.aspx |
Mercury Porosimetry | Extrusion curve dropping below intrusion curve | What would cause the extrusion curve near maximum pressure on a mercury porosimetry analysis to drop below the intrusion curve? | /Library/FAQs/Extrusion-Curve-Dropping-Below-Intrusion-Curve.aspx |
Chemical Adsorption | Pulse chemisorption peaks | When examining the results of a pulse chemisorption analysis provided by your MAL, I noticed that the last three peaks are exactly the same size. Previous peaks differ in size. Why do these peaks appear to be identical? Did the gas bypass the sample? | /Library/FAQs/Pulse-Chemisorption-Peaks.aspx |
Chemical Adsorption | Repeat analyses | Why is a repeat analysis necessary when doing a chemisorption analysis? | /Library/FAQs/Repeat-Analyses.aspx |