Biological test method for measuring terrestrial plants exposed to contaminants in soil: appendix H

Appendix H - Logarithmic Series of Concentrations Suitable for Toxicity Tests

Logarithmic Series of Concentrations Suitable for Toxicity Tests^Footnote*

Column (Number of concentrations between 10.0 and 1.00, or between 1.00 and 0.10)^Footnote**

1	2	3	4	5	6	7
10.0	10.0	10.0	10.0	10.0	10.0	10.0
3.2	4.6	5.6	6.3	6.8	7.2	7.5
1.00	2.2	3.2	4.0	4.6	5.2	5.6
0.32	1.00	1.8	2.5	3.2	3.7	4.2
0.10	0.46	1.00	1.6	2.2	2.7	3.2
	0.22	0.56	1.00	1.5	1.9	2.4
	0.10	0.32	0.63	1.00	1.4	1.8
		0.18	0.40	0.68	1.00	1.3
		0.10	0.25	0.46	0.72	1.00
			0.16	0.32	0.52	0.75
			0.10	0.22	0.37	0.56
				0.15	0.27	0.42
				0.10	0.19	0.32
					0.14	0.24
					0.10	0.18
						0.13
						0.10

Footnotes

Footnote *

Modified from Rocchini et al. (1982).

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Footnote **

A series of five (or more) successive concentrations should be chosen from a column. Midpoints between concentrations in column (x) are found in column (2x + 1). The values listed can represent concentrations expressed on a weight-to-weight (e.g., mg/kg) or weight-to-volume (e.g., mg/L) basis. As necessary, values can be multiplied or divided by any power of 10. Column 1 might be used if there was considerable uncertainty about the degree of toxicity. More widely spaced concentrations should not be used, since such will provide poor resolution regarding the confidence limits surrounding any threshold-effect value calculated.

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Date modified:: 2017-06-13

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Biological test method for measuring terrestrial plants exposed to contaminants in soil: appendix H

Appendix H - Logarithmic Series of Concentrations Suitable for Toxicity Tests

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