Distributions and Sources of Sedimentary Sterols as well as Their Indications of Sewage Contamination in the Guanting Reservoir, Beijing

Table 5

Sterol ratio parameters in the Guanting Reservoir sediment.

Sample point	Coprostanol/(coprostanol + cholestanol)	Coprostanol/(cholesterol + cholestanol)	Coprostanol/cholestanol	Coprostanol/cholesterol	Epicoprostanol/coprostanol
G1	0.22	0.07	0.28	0.10	1.56
G2	0.17	0.03	0.21	0.04	0.97
G3	0.28	0.15	0.40	0.25	0.97
G4	0.19	0.08	0.23	0.13	0.90
G5	0.41	0.16	0.68	0.22	0.58
G6	0.44	0.27	0.79	0.41	0.94
G7	0.38	0.22	0.62	0.34	0.75
G8	0.40	0.25	0.66	0.41	0.58
G9	0.55	0.37	1.25	0.53	0.58
G10	0.43	0.18	0.75	0.23	0.52
G11	0.24	0.10	0.32	0.16	1.76
G12	0.34	0.14	0.52	0.20	1.06
G13	0.34	0.09	0.51	0.11	0.89
G14	0.33	0.22	0.49	0.39	0.72
G15	0.38	0.13	0.61	0.17	1.22
G16	0.55	0.32	1.20	0.43	0.78
G17	0.30	0.13	0.43	0.18	1.22
G18	0.29	0.09	0.41	0.11	0.93
G19	0.41	0.16	0.69	0.22	0.76