Environmental Sciences Europe

Table 2 Phase 2% biodegradation results with recalculated values (where this was possible)

From: Ring testing of the AnBUSDiC test; a new screening method for the anaerobic degradability of surfactants

Test substance	Result
	Lab
	1	4	6	7
Glucose	81.9	92.7	74.9	82.1
Phase 2	81.9	92.7	74.9	82.1
Phase 2 re-calculated	63.2	NA	37.4	82.1
FAS	97.4	123.0	84.0	129.0
Phase 2	97.4	123.0	84.0	129.0
Phase 2 re-calculated	NA	NA	NA	NA
Betaine
Phase 2	76.8	77.0	67.3	83.0
Phase 2 re-calculated	56.6	NA	54.8	71.2
isoFA + 7EO
Phase 2	66.3	51.5	23.9	55.0
Phase 2 re-calculated	36.5	NA	12.2	35.5
FA + 7EO
Phase 2	95.3	106.0	123.4	118.0
Phase 2 re-calculated	NA	NA	NA	98.3
LAS
Phase 2	22.7	31.0	6.2	26.0
Phase 2 re-calculated	16.2	26.7	3.1	16.0

NA = Result could not be re-calculated as the phase 1 degradation was more than 100%.

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