Table 1.

Datasets that showed non-compliances with the analysis protocol and technical specifications, with consequence that data were not considered for establishing the certified value

Material	Lab code	Number of replicates	Reason for rejection
IRMM-359a	B	4	Reconstitution masses outside range
	C	8	pH after neutralisation outside range
	G	3	Final extract mass outside range
	K	8	pH after acidification outside range
IRMM-359b	B	4	Reconstitution masses outside range
	B	2	Final extract mass outside range
	K	7	pH after acidification outside range
IRMM-359c	B	1	Reconstitution masses outside range
	G	1	Final extract mass outside range
	J	1	Partial sample loss during manipulation
	K	7	pH after acidification outside range