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Table 2 Elemental chemical composition of free 4-amino salicylic acid and its nanocomposite

From: Sustained release formulation of an anti-tuberculosis drug based on para-amino salicylic acid-zinc layered hydroxide nanocomposite

Sample Ca(%w/w) Na(%w/w) C/N Znb(%w/w) aniona(%w/w) BET surface area m2/g BJH pore volume cm3/g BJH Average pore diameter Å
ZnO - - - (80.30) - 6.4 0.010 111
4-ASA 58.68 9.75 6.02 - - - - -
4-ASAN 10.54 1.54 6.84 52.7 16.86 80.5 0.260 96
  1. Value in the parentheses is a theoretical value, an estimated from CHNS analysis, bestimated from ICP analysis.