Table 1. Amount of total and bioavailable cadmium in amended LUFA soil samples^*.

	Soil					Soil solution
	total†	bioavailable cadmium				total		bioavailable cadmium
		in vivo	% of total	in vitro	% of total	ICP-AES	% of total	in vivo	% of soluble total	% of total
	0	N.D.	-	N.D.	-	<LOD‡	-	N.D.	-	-
	10	8.42 ±0.99	84.2	3.81 ±0.65	38.1	0.22 ±0.02	2.23	0.015 ±0.035	29.69	0.66
Amended	20	12.18 ±0.75	60.9	7.92 ±1.06	39.6	0.24 ±0.04	2.44	0.034 ±0.067	38.36	0.59
LUFA soil	30	12.87 ±2.54	42.9	9.87 ±0.82	32.9	0.30 ±0.08	2.97	0.083 ±0.013	47.84	0.47
	40	14.92 ±2.76	37.3	12.05 ±1.65	30.1	0.39 ±0.07	3.87	0.201 ±0.019	67.84	0.65
	50	17.56 ±2.63	35.1	12.89 ±2.36	25.7	0.43 ±0.09	4.28	0.278 ±0.112	76.02	0.65

* The values were converted to μg of cadmium/g of soil and represented as average with standard deviation as errors from more than 3 replicated tests, N.D.; not determined, % of total was the percentage of determined amount out of total cadmium in samples.

^† The concentration of cadmium originally spiked in LUFA standard soil.

^‡ The concentration was lower than instrumental limit of detection.