السلام عليكم
اتمنى منكم مساعدتي في حل اسئله
لماده طرق فصل تحليليه وكهروكيميائيه
لاتهملوا موضوعي رجاااء
QUESTIONS AND PROBLEMS
32-1. List the types of substances to which each of the following chromatographic methods is most appli- cable:
*(a) gas-liquid *(e) gel permeation
(b) liquid partition (f) gel filtration
*© ion-exchange (g) gas-solid
(d) liquid adsorption
32-2. Define
(a) isocratic elution..
(b) gradient elution
© stop-flow injection.
(d) reversed-phase packing.
*(e) normal-phase packing.
(f) ion pairing chromatography
*(g) ion chromatography.
- (h) eluent suppressor column.
*(j) gel filtration.
- (j) gel permeation.
32-3. Indicate the order in which the following com- pounds would be eluted from an HPLC column .containing a reversed-phase packing:
*(a) benzene, diethyl ether, n-hexane
(b) acetone, dichioroethane, acetamide
32-4. Indicate the order of elution of the following com- pounds from a normal-phase packed HPLC column:
*(a) ethyl acetate, acetic acid, dimethylamine
(b) propylene, hexane, benzene, dichlorobenzene
*32_5. Describe the fundamental difference between. adsorption and partition chromatography.
32-6. Describe the fundamental difference between ion- - exchange and size-exclusion chromatography.
*32-7. Describe the difference between gel-filtration and gel-permeation chromatography.
32-8. What types of species can be separated by HPLC but not by GC?
32-10. Describe the differences between single-columns. and suppressor-column ion chromatography.
