Loss of weight on heating

Loss of weight on heating. NF T 66-011 and ASTM D 6. The loss of weight on heating can also be measured during the RTFOT test. 

Moisture measurements are important in the process industries because moisture can foul products, poison reactions, damage equipment, or cause explosions. Moisture measurements include both absolute-moisture methods and relative-humidity methods. The absolute methods are those that provide a primaiy output that can be directly calibrated in terms of dew-point temperature, molar concentration, or weight concentration. Loss of weight on heating is the most familiar of these methods. The relative-humidity methods are those that provide a primaiy output that can be more direc tly calibrated in terms of percentage of saturation of moisture. 

This method is used for determining the moisture and volatiles of explosives on the basis of loss of weight on heating at 100° 5°C. 

This method is used for determining the moisture and volatiles, on the basis of loss of weight on heating at 55° 2°C. under vacuum, on multi-component explosives that contain material that would be damaged by 100°C. heat treatment at atmospheric pressure. 

Dutch Stability Test. This test, which may be considered as a modification of "Simon Thomas Fume Test , was devised in 1920 by Van Duin and Van Lennep (Ref 1). Here the loss of weight on heating of a propellant (or explosive) served as a criterion of stability... 

A thermal gravimetric analysis performed on chlor-diazepoxide exhibited no loss of weight when heated to 105°C. ... 

A TGA scan performed on chlordiazepoxide hydrochloride exhibited no loss of weight when- heated to 105°C8. 

ASTM D2288-97(2001) Standard Test Method for Weight Loss of Plasticizers on Heating... 

Dr. Justus Liebig analysirt, Vienna, 1844. Meissner published a Handbuch der Chemie, 2 vols., Vienna, 1819-20 Neues System der Chemie organischer Korper, Vienna, 1838 and a Neues System der Chemie, 3 vols., Vienna, 1841, in which (i, 171) he calls caloric Araon, symbol Ar, with compounds called araoids, and ponderable, since Meissner found a loss of weight on mixing sulphuric acid and water, when heat is evolved. 

Sulphate. Melamine sulphate eliminates the water of crystallisation on heating between 100 - 230 0 as shown by TG, DTG and water evolution curves of Figure 10 (1st step). The amount of water evolved corresponds to one molecule per molecule of salt (calculated weight loss 7.4% experimental 8%). The IR of the anhydrous salt is shown in Figure 11A in which the typical strong band of sulphate anion group at 1095 cm-1 is evident. 

Symptoms of thyrotoxicosis include nervousness, anxiety, palpitations, emotional lability, easy fatigability, heat intolerance, loss of weight concurrent with an increased appetite, increased frequency of bowel movements, proximal muscle weakness (noted on climbing stairs or arising from a sitting position), and scanty or irregular menses in women. 

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