Rehydration tests for the dried sample, Chemistry

Assignment Help:

Q. Rehydration tests for the dried sample?

• gain knowledge about the sensory changes that take place during the dehydration of the samples, and

• learn about the effectiveness of different drying techniques.

Principle

Rehydration tests for the dried materials are important as they give idea about the percentage water in the rehydrated material, rehydration ratio and coefficient of rehydration. However, no standard method for testing these are available, although are developed by the plants where the daily evaluation of quality of dried products is made.

Materials Required

Sample: Culture or dehydrated carrots or dehydrated cauliflower or dehydrated

cabbage. (Take any 3 dried sample).

Beakers - (6)

Distilled water

Filter paper

Burner

Funnel

Weighing balance

Petri dish

Procedure

The following procedure for measuring rehydration is suggested by the US

Department of Agriculture. Follow these steps and carry out the activity.

1) Weigh 2-10 g of the dry material (sample) in six beakers of 500 ml capacity.

2) Add 80-150 ml of distilled water*

3) Cover each beaker with watch glass, bring to a boil within 3 min on an electric heater/burner and continue boiling for 5 minute.

4) Filter through whatman no. 4 filter paper and drain excess water until the drip from the funnel has stopped.

5) Remove the sample from the funnel and weigh in a weighed petri dish.

6) Set the sample aside for conducting quality tests.

7) Rehydrate six other 10 g samples, boiling two for 10 minutes, two for 20 minutes, and two for 30 minutes.

8) Boiling should be carried out carefully for proper rehydration of samples.

9) Now record your observations and do the calculations as stated herewith.


Related Discussions:- Rehydration tests for the dried sample

If electron falls from emitted energy is, If electron falls from n=3  to n=...

If electron falls from n=3  to n= 2 , then emitted energy is: (1) 10.2ev                            (2) 12.09 ev           (3) 1.9ev                              (4)0

Functions of nucleic acid - replication, Replication: The genetic infor...

Replication: The genetic information for the cell is comprised in the sequence of the bases A, T, G and C that are adenine, thymine, guanine and cytosine correspondingly in the

The following has zero valency, The following has zero valency : (1) Sod...

The following has zero valency : (1) Sodium (2) Beryllium (3) Aluminium (4) Krypton Ans: Krypton

Acid-base titrations - titration curves, ACID-BASE TITRATIONS Titratio...

ACID-BASE TITRATIONS Titration curves: An acid-base titration is a useful experimental method for determining also the amount of an unknown acid or base in solution and th

Physical and derived quantities, 1. Discuss how such discoveries, technolog...

1. Discuss how such discoveries, technological advancement and breakthroughs were achieved and the person behind this advancement, it can be local or international. 2. List the ma

Chlorination, 90ml of an unknown concentrated chlorine was diluted with 225...

90ml of an unknown concentrated chlorine was diluted with 2250l of water.The dilution now is 0.08mg/l. what is the initial concentration of the chlorine before dilution?

Longest chain rule - iupac system of nomenclature, Longest chain Rule - IUP...

Longest chain Rule - IUPAC system of nomenclature The primary step in naming an organic compound is to choose the longest continuous chain of carbon atoms that may or may not

Electroanalytical technique, Electroanalytical technique: An electroan...

Electroanalytical technique: An electroanalytical technique is based on the measurement of one or more electrical quantities and their magnitudes could be correlated with the

Calculate the molar concentration, Calculate the molar concentration of the...

Calculate the molar concentration of the solution essential to obtain the value of 10 molecules per µm2. (For this calculation we suppose that the transfer of the dye molecules fro

Addition polymerization, Addition polymerization: It involves following th...

Addition polymerization: It involves following three mechanisms: 1.                 Free radical polymerization 2.                 Ionic polymerization mechanism 3.

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd