Survey of Octylphenol, Nonylphenol, and Bisphenol A in Infant Milk Powders by Solid-Phase Extraction Combined GC/MS Method

Table 3

Analysis results of 4-OP, 4-NP, and BPA in 60 infant milk powder samples.

Sample numbers	BPA results (μg/kg)
1	—
2	1.7
3	1.3
4	1.0
5	1.6
6	—
7	—
8	—
9	—
10	1.9
11	—
12	1.2
13	2.3
14	3.7
15	0.9
16	1.4
17	8.0
18	1.8
19	—
20	—
21	—
22	—
23	—
24	—
25	14.0
26	1.7
27	1.6
28	3.0
29	—
30	2.1
31	2.0
32	—
33	1.8
34	1.3
35	—
36	—
37	1.6
38	0.9
39	1.3
40	1.7
41	1.2
42	—
43	1.6
44	1.1
45	—
46	—
47	—
48	—
49	3.0
50	—
51	1.3
52	3.1
53	—
54	1.9
55	1.6
56	—
57	—
58	1.2
59	3.4
60	0.8

4-OP and 4-NP could not be detected.