A colorimetric method for the molecular weight determination of polyethylene glycol using gold nanoparticles

Table 1 M_w, R_h, R_g(Equation 2), and 〈 h²〉^1/2(Equation 3) values of PEG samples used in this study

Samples	M_w(Da)^a	R_h(nm)^b	R_g(nm)^c	〈h²〉^1/2(nm)^d
APEG 400	378 ± 30	0.568 ± 0.027	0.668 ± 0.032	1.636 ± 0.078
APEG 600	521 ± 51	0.672 ± 0.054	0.791 ± 0.064	1.938 ± 0.156
APEG 1,000	997 ± 77	0.944 ± 0.025	1.111 ± 0.029	2.721 ± 0.072
APEG 2,000	1,887 ± 20	1.602 ± 0.284	1.885 ± 0.334	4.617 ± 0.818
APEG 4,000	3,981 ± 82	1.784 ± 0.165	2.099 ± 0.194	5.141 ± 0.475
APEG 6,000	6,185 ± 165	2.343 ± 0.111	2.756 ± 0.131	6.751 ± 0.320
APEG 8,000	8,232 ± 162	2.749 ± 0.101	3.234 ± 0.119	7.922 ± 0.291
APEG 10,000	10,535 ± 907	3.306 ± 0.063	3.889 ± 0.074	9.526 ± 0.182
APEG 12,000	13,646 ± 1359	3.522 ± 0.061	4.144 ± 0.072	10.151 ± 0.176
APEG 20,000	19,118 ± 631	4.415 ± 0.015	5.194 ± 0.018	12.723 ± 0.043
SPEG 1,450	1,348 ± 64	1.203 ± 0.097	1.415 ± 0.114	3.466 ± 0.280
SPEG 4,600	4,384 ± 436	2.095 ± 0.045	2.465 ± 0.053	6.038 ± 0.130
SPEG 8,000	8,350 ± 301	2.572 ± 0.299	3.026 ± 0.352	7.412 ± 0.862
SPEG 10,000	10,641 ± 219	3.474 ± 0.214	4.087 ± 0.252	10.011 ± 0.617

^aM_w was determined by MALLS. ^bR_h was determined by DLS. ^cR_g was calculated using Equation 2. ^d〈h²〉^1/2 was calculated using Equation 3.