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Table 5 Quantitative analysis of selected substances from DSLT eluates from the grout MOE1 and calculation of mixture toxicity

From: Investigating the ecotoxicity of construction product eluates as multicomponent mixtures

Substance

Measured concentration in mg L−1

NOEC algae in mg L−1

Calculated LID (concentration/NOEC)

EC50 algae in mg L−1

Pi

Pi/EC50

N,N-Dimethyl-n-dodecylamine

0.4

0.0026

153.8

0.016

0.006

0.368

4-tert-butylphenol

7.6

0.32

23.8

13

0.112

0.009

Benzyl alcohol

6.4

310

0.02

770

0.094

0.0001

1,3-Benzenedimethanamine

42.9

6.3

6.8

12

0.632

0.053

Sum

57.3

–

184.4

–

–

0.43

Measured LID in this study:

  

384–1536

   

Mean measured LID from round robin test

  

166

  

2.33 Vol.-%

Calculated EC50 mixture toxicity

     

1.16 Vol.-%

Geometric mean of measured EC50 from round robin test

      
  1. Selection criteria for substances: confirmed by reference substances and/or substances classified as H400, H410, or H411. Measured concentrations are mean values of the eluate from this study and from the eluate for the round robin test [23]. NOEC and EC50 for algae are from the ECHA database [46]. Pi is the relative proportion of the ith component in the mixture. The EC50 mixture toxicity is calculated as the reciprocal sum of Pi/EC50 values (1/0.43 = 2.33 Vol.-%)