Table 3. Recoveries of methylmercury chloride from spiked south Florida periphyton.
[Hg, mercury; MeHgCl, methylmercury chloride; WCA, Water Conservation Area; BCNP, Big Cypress National Preserve]

Sample	Concentration of Hg in unspiked periphyton	Total Hg, in micrograms per gram dry weight periphyton, original sample	MeHgCl as Hg in micrograms per gram dry weight periphyton, original sample	MeHgCl in micrograms per gram dry weight periphyton, extraction sample	Recovery of MeHgCl, in percent
WCA2 E1	Large	0.67	0.11	1.00	.96
				1.28	1.06
				2.05	1.03
BCNP A2	Small	.05	.04	.79	.95
				.87	.98
				2.02	1.12
WCA2 E4	Intermediate	.32	.05	.55	.98
				.58	.95
				.68	1.02
				.68	.87
				.76	1.02
				.78	1.05
				.87	1.00
				.87	.95
				1.28	.98
				1.29	1.13
				1.46	1.03
				1.50	0.95