. 2023 Jun 9;8(25):22866–22875. doi: 10.1021/acsomega.3c01856

Table 5. Accuracy Evaluation of the Proposed Method Using the Certified Reference Materials^a.

standard reference material	certified value	found value
NIST 1640a (μg L^–1)	12.101 ± 0.050	12.134 ± 0.028
DOLT:5 (mg kg^–1)	0.162 ± 0.032	0.178 ± 0.015

Results are given as average ± standard deviation (n = 3).

Table 5. Accuracy Evaluation of the Proposed Method Using the Certified Reference Materialsa.