被世界卫生组织食品添加剂联合委员会认可的营养型抗氧化剂是
A. L-抗坏血酸
B. L-抗坏血酸棕榈酸酯
C. 异抗坏血酸
D. 异抗坏血酸钠
Which analysis indicates whether a particular element or compound is in the sample?
A. Qualitative analysis.
B. Quantitative analysis.
Chemical analysis.
D. Instrumental analysis.
Modern analytical chemistry can be used for many fields, for example.
A. in industrial production
B. in evaluation of commodity quality
C. in health area and in the environment
D. above of all
can be used for determining molecular weight of a compound.
A. HPLC
B. MS
C. IR
D. HMR
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