Table 1.

Percentage loading of PAS in nanocomposites A, B, and C as determined by HPLC, UV/Vis spectrophotometry, and nitrogen elemental analysis

Number	Sample name	Percentage loading PAS by HPLC analysis	Percentage loading by UV/Vis or by N percentage
1	Nanocomposite A	25.00	22.80 (UV/Vis)
2	Nanocomposite B	16.00	16.60 (UV/Vis)
3	Nanocomposite C	15.00	16.86 (Nitrogen)

Notes: Nanocomposite A is PAS-Zn/Al LDH prepared by the coprecipitation method. Nanocomposite B is PAS-Zn/Al LDH prepared by the ion exchange method. Nanocomposite C is PAS-ZLH prepared using ZnO as the precursor.

Abbreviations: HPLC, high-performance liquid chromatography; PAS, paraaminosalicylic acid; PAS-ZLH, PAS with zinc layered hydroxide; PAS-Zn/Al LDH, PAS with Zn/Al layered double hydroxides; UV/Vis, ultraviolet visible.