2.下列何者不屬於多醣類乳化劑（emulsifying agent）？
(A)acacia
(B)beeswax
(C)tragacanth
(D)starch

Naturally occurring emulsifying agents
Polysaccharides
Acacia is the best emulsifying agent for extemporaneously prepared oral emulsions as it forms a thick film at the oil–water interface to act as a barrier to coalescence. It is too sticky for external use. Tragacanth is used to increase the viscosity of an emulsion and prevent creaming. Other polysaccharides, such as starch, pectin and carrageenan, are used to stabilize an emulsion.

Semi-synthetic polysaccharides.
Low-viscosity grades of methylcellulose (see Example 35.2) and carboxymethylcellulose will form o/w emulsions.

Sterol-containing substances.
These agents act as water-in-oil emulsifying agents. Examples include beeswax, wool fat and wool alcohols (see Ch. 36).

ref : Pharmaceutical Practice 5th Edition p.330

補個調劑學國考題加深印象~~
Acacia 阿拉伯膠
Tragacanth 西黃耆膠
都常被作為乳化劑使用

12.利用精油：水：西黃耆膠調配乳劑初乳時，其比例為：
(A)20：1：20
(B)1：20：1
(C)1：20：20
(D)20：20：1

專技 - 藥劑學(包括生物藥劑學)- 104 年 - 104-1-藥師(一)-藥劑學(包括生物藥劑學)#19187

答案：D

31 以乾膠法（dry gum method）製備一乳劑之初乳時，最經常被使用之乳化劑為下列何者？
(A)Pluronic F68
(B)Acacia
(C)Tragacanth
(D)Gelatin

公職 - 藥劑學- 94 年 - 094-公職藥師-第二試-藥劑學(包括生物藥劑學)#7089

答案：B