Gelatin: Physical and chemical tests / Analysis of crude drugs

Aim: To identify the chemical characteristics of a given sample.

Background

Gelatin occurs in thin sheets, strips or as granular powder. High-grade gelatin light yellow, semi-crystalline substance. It is Odourless and tasteless. In cold water, it swells up and slowly dissolves on warming to form a viscous solution.

Chemical Tests:

• When gelatin is heated with soda lime in a dry test tube, ammonia is evolved due to the presence of the nitrogenous compounds in gelatin.

• Gelatin solution is added to Million’s reagent to give a white ppt, which turns red on heating.

• Gelatin gives buff white ppt with a tannic acid solution.

• Biuret test to 3 ml of test solution of gelatin. NaOH (1ml of 5%) is added whereby white to whitish buff coloured ppt is formed which does not dissolve on heating.

• Yellow ppt. is formed by adding picric acid to a solution of gelatin.

• It gives a yellow ppt. with trinitrophenol in an aqueous solution.

CONCLUSION

From the above morphological characteristics and chemical tests, the given crude drug is identified as Gelatin.

REFERENCES

Kokate CK. Practical Pharmacognosy, 4 edition, VallabhPrakashan. Delhi; 1994: 98

F Y D Pharm & S Y D Pharm Notes, Books, Syllabus, PDF, Videos

First Year D Pharm	Second Year D Pharm
ER20-11T Pharmaceutics Theory	ER20-21T Pharmacology Theory
ER20-11P Pharmaceutics Practical	ER20-21P Pharmacology Practical
ER20-12T Pharmaceutical Chemistry Theory	ER20-22T Community Pharmacy & Management Theory
ER20-12P Pharmaceutical Chemistry Practical	ER20-22P Community Pharmacy & Management Practical
ER20-13T Pharmacognosy Theory	ER20-23T Biochemistry & Clinical Pathology Theory
ER20-13P Pharmacognosy Practical	ER20-23P Biochemistry & Clinical Pathology Practical
ER20-14T Human Anatomy Physiology Theory	ER20-24T Pharmacotherapeutics Theory
ER2014P Human Anatomy Physiology Practical	ER20-24P Pharmacotherapeutics Practical
ER20-15T Social Pharmacy Theory	ER20-25T Hospital & Clinical Pharmacy Theory
ER20-15P Social Pharmacy Practical	ER20-25P Hospital & Clinical Pharmacy Practical
	ER20-26T Pharmacy Law & Ethics

Second Year B Pharm Notes, Syllabus, Books, PDF Subjectwise/Topicwise

S Y B Pharm Sem III	S Y B Pharm Sem IV
BP301T Pharmaceutical Organic Chemistry II Theory	BP401T Pharmaceutical Organic Chemistry III Theory
BP302T Physical Pharmaceutics I Theory	BP402T Medicinal Chemistry I Theory
BP303T Pharmaceutical Microbiology Theo	BP403T Physical Pharmaceutics II Theory
BP304T Pharmaceutical Engineering Theory	BP404T Pharmacology I Theory
BP305P Pharmaceutical Organic Chemistry II Practical	BP405T Pharmacognosy I Theory
BP306P Physical Pharmaceutics I Practical	BP406P Medicinal Chemistry I Practical
BP307P Pharmaceutical Microbiology Practical	BP407P Physical Pharmaceutics II Practical
BP308P Pharmaceutical Engineering Practical	BP408P Pharmacology I Practical
	BP409P Pharmacognosy I Practical

Suggested readings

• Tragacanth: Physical and chemical tests / Analysis of crude drugs
• BP205T Computer Applications in Pharmacy
• BP409P Pharmacognosy I Practical
• ER20-13T Pharmacognosy Theory D Pharm
• Acacia: Physical and chemical tests / Analysis of crude drugs

Recommended readings:

• Pharmaceutics I Practical
• b pharmacy syllabus
• Pharmaceutics I Theory

---