Table 2. Physical Parameters of BSA Nanospheres and Cp-BSA Nanospheres at Different pH Values.

s.no.	BSA nanospheres	particle size (nm)	ζ-potential (mV)	entrapment efficiency (%)
1	blank BSA nanospheres pH 7	126.9	1.13
2	Cp-BSA nanospheres pH 5	1623	6.05	6.4
3	Cp-BSA nanospheres pH 7	188.5	–4.86	82.3
4	Cp-BSA nanospheres pH 9	315.1	–5.39	63.1