Topics:
Animal Nutrition, Animal Refresher
Match: Proximate Principles and Laboratory Methods
Match the column: Proximate Analysis Methods
| Proximate principle | Analysis method |
|---|---|
| 1. Crude protein | (a) Calculated by difference |
| 2. Ether extract | (b) Hot air oven |
| 3. Total Ash | (c) Kjeldahl method |
| 4. Moisture | (d) Soxhlet apparatus |
| 5. NFE | (e) Muffle furnace |
- 1-c, 2-d, 3-e, 4-b, 5-a — Correct Answer
- 1-d, 2-c, 3-e, 4-b, 5-a
- 1-c, 2-e, 3-d, 4-a, 5-b
- 1-b, 2-d, 3-e, 4-c, 5-a
Explanation:
Correct Answer: 1-c, 2-d, 3-e, 4-b, 5-a
Each proximate principle in the Weende system is estimated by a specific laboratory method. Matching these correctly is fundamental to feed analysis.
Proximate Principles and Analysis Methods — Matching
| Proximate Principle | Method | Conditions |
|---|---|---|
| 1. Crude Protein | (c) Kjeldahl method | Measures total nitrogen; CP = N × 6.25 |
| 2. Ether Extract | (d) Soxhlet apparatus | Extracts all ether-soluble substances (fat, waxes, carotene, fat-soluble vitamins) |
| 3. Total Ash | (e) Muffle furnace | 600°C for 2 hours; burns off organic matter |
| 4. Moisture | (b) Hot air oven | 100°C for 1 hour; drives off water |
| 5. NFE | (a) Calculated by difference | NFE% = 100 − (CP + EE + CF + Ash)% |
Additional Notes
- Stutzer's reagent (alkaline CuSO₄) → estimates protein content of feed
- CP = True Protein + Non-Protein Nitrogen (NPN)
- Weende system proposed by Henneberg & Stohmann at Weende experimental station, Germany, 1865
Why Other Options Are Wrong
- 1-d, 2-c, 3-e, 4-b, 5-a → swaps Kjeldahl (CP) with Soxhlet (EE)
- 1-c, 2-e, 3-d, 4-a, 5-b → assigns Muffle furnace to EE; incorrect
📚 About this Topic — Animal Nutrition
This multiple choice question is from Animal Nutrition, Animal Refresher. It has 4 options with a detailed explanation of the correct answer. Practice more MCQs from Animal Nutrition to strengthen your preparation.
