Which one of the following species is a derivatization reagent according to the paragraph about the determination of a residual glutaraldehyde in a polymeric film?
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   I.   Pentafluorobenzyl oxime
  II.   Hydrazine
 III.   Formaldehyde
 IV.   Dinitrophenylhydrazine
 V.   Benzaldehyde
a. I, IV, V
b. I, II, III, V
c. I, II, III, IV
d. I, III, IV
e. I, II, IV
according to the paragraph about the determination of a residual glutaraldehyde in a polymeric film the derivatization reagent is Pentafluorobenzyl oxime,Hydrazine,Dinitrophenylhydrazine.
so, the correct answer is e) i, ii, iv
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