Experiments No 17 : To determine loss on drying of Absorbent cotton wool I.P.
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| experiment no 17 |
Questions
1. State the principle of "Loss on drying"
2 Why it is important to determine loss on drying of
absorbent cotton ?
3 State IP standards of loss on drying for absorbent cotton
4. What does "constant weight means?
5. What is the use of desiccator?
6. Name any two desiccants placed in a desiccator
7 Why the bottle should be kept open, while drying in an
oven?
8 Why the stopper of the bottle should be placed in an oven
during drying?
9 State the temperature of oven during the determination of
LOD of absorbent cotton
10 if the given sample of absorbent cotton wool has 10% w/w
LOD, sts whether it passes or falls the lest
(Answers)
Q .1 Ans - principle of loss on drying - A method
commonly used for moisture content determination is the loss on drying method
or 100. It is used to sefty many major quality Specification, this is based on
the thermogravimetric principle in which a substanice is heated until on no
more weight to last that is it
Completely dog.
Q .4 Ans - Constant weight is a freediving discipline
recognised by AIDA, the International Association for the Doviepment of Apnea.
In which the freediver dessends and Assends. using their fins/'m onofin and
with the uses of their arms without pulling on the rope or changing his ballast
dory a single hord of the rоре .
Q .5 Ans - Desicates are scalable enaosures Containing
desicacants used for preserving
moisture sensitive items such as cobalt chloride paper for
another use. A common
which are hydroscopic or which reacts with water from
humidity .
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