Table 1.

Concentrations of GA-AuNPs samples by AAS at (200, 500, 1000, 2000 pulses).

Number of pulses	Solution colour	Average concentration of GA-AuNPs (ppm)	Absorbance (a.u)	Absorption peak (nm)
200	Light pink	13.07 ± 0.0054	0.427	513.63
500	Light purplish-red	36.22 ± 0.0053	0.985	515.18
1000	Dark purplish-red	54.68 ± 0.0096	1.614	513.63
2000	Dense purplish-red	75.6 ± 0.0119	2.141	521.0