Table 2.

Validation of the sample clean-up procedure of ATMP, EDTMP and DTPMP

Phosphonate	Condition	LOD mg L−1	LLOQ mg L−1	PSD -	rel. PSD%	Slope-	Recovery%
ATMP (UPW)	Without CER	1.281	1.901	0.150	2.498	0.3590 ± 0.0120	-
	CER	5.214	5.845	0.221	2.606	0.3473 ± 0.0162	96.7 ± 4.51
	CER 100	3.119	4.479	0.145	1.936	0.3854 ± 0.0153	> 100
	CER 1000	1.404	2.796	0.083	1.179	0.3969 ± 0.0109	> 100
ATMP (TW)	CER	0.586	1.873	0.111	1.818	0.1877 ± 0.0113	52.5 ± 3.14
	CER 100	0.559	2.427	0.109	1.809	0.2109 ± 0.0100	58.8 ± 2.78
	CER 1000	1.367	1.447	0.142	2.029	0.2142 ± 0.0111	59.7 ± 3.09
EDTMP (UPW)	No CER	6.045	11.615	0.196	0.981	0.4341 ± 0.0126	-
	CER	14.348	15.286	1.067	5.335	0.4230 ± 0.0098	97.5 ± 2.26
	CER 100	11.827	13.880	0.663	3.157	0.2329 ± 0.0076	53.6 ± 1.76
	CER 1000	5.706	8.093	0.416	2.082	0.2177 ± 0.0165	50.2 ± 3.81
EDTMP (TW)	CER	5.870	8.741	0.253	1.267	0.3301 ± 0.0146	76.1 ± 3.36
	CER 100	8.623	12.340	0.198	1.040	0.4926 ± 0.0164	> 100
	CER 1000	6.598	12.787	0.437	2.300	0.4280 ± 0.0167	98.6 ± 3.86
DTPMP (UPW)	No CER	9.913	12.703	0.252	1.677	0.4700 ± 0.0123	-
	CER	10.195	14.242	0.160	1.144	0.2495 ± 0.0079	53.1 ± 1.68
	CER 100	8.690	10.595	0.123	0.818	0.1876 ± 0.0099	39.9 ± 2.10
	CER 1000	9.067	10.349	0.143	0.952	0.3896 ± 0.0161	82.9 ± 3.42
DTPMP (TW)	CER	8.372	11.719	0.202	1.348	0.3411 ± 0.0119	72.6 ± 2.53
	CER 100	8.872	12.630	0.190	1.266	0.3176 ± 0.0165	67.6 ± 3.50
	CER 1000	8.951	13.554	0.185	1.233	0.2626 ± 0.0113	55.9 ± 2.41