TGA / DTA Analysis

Description

TGA of the biomass residues was performed using a TG analyzer (TGA-Q500 series, TA instruments) at standard pressure. The sample was first dried to constant weight at 103°C to remove all moisture present then pulverized and silver to 50microns size prior to the analysis. About 10.0 mg of each sample was placed in platinum crucibles in the furnace chamber of the TGA and heated linearly at a given heating rates, (5, 10, 15, 20, 25, or 30 °C/min) from ambient room temperature to 950 °C. Nitrogen gas was opened and allowed to flow throughout the chamber of the furnace at a flow rate of 30 mL/min. This was used to purge the system and also provided the inert atmosphere for the experiments. The Thermogravimetric analysis then produced a curve, that shows the effect of temperature (or time), presented on the x axis, on the weight of the sample (the y axis). The weight is usually expressed in terms of the percentage of the sample that remains, versus the weight at the start of the experiment, at a given temperature/time. The results also include a second y axis on the graph which presents the data for the first derivative of the TGA curve. This is known as the Derivative Thermogravimetric Analysis (DTA) curve and represents the rate of change of mass with respect to temperature. The DTA curve often allows for easier visual interpretation of the data, as periods of large mass change can be seen with more clarity.

Packaging Instructions

For Liquid samples, per analysis, measure 5ml
Measure 2grams per analysis for solid samples
Liquid samples should be sent in sample bottles, pet bottles, or any air-tight container.
Solid samples should be sent in zip lock bags, sample bottles, or any air-tight container.
Samples should be labeled legibly with paper tape, marker, or writing pen.
Labels should be short and precise (not more than 3 words).
All samples must be strapped together and secured in a bag prior to transport.
Write the Following on the Bag, or Envelope “Allschoolabs Analysis – Receiver: Madison, 08163383206” then add the address of whichever collection center you are sending to.

Other Instructions

For Thermal Conductivity Tests, samples can be prepared in 5cm² x 0.5cm or you make it the size of a coin. If you can’t, please inform us before applying.

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