Effects of Iron Concentration Level in Extracting Solutions from Contaminated Soils on the Determination of Zinc by Flame Atomic Absorption Spectrometry with Two Background Correctors

Table 3

Pseudototal Fe, Cu, and Zn concentrations (mean value ± standard deviation) measured in certified reference soil (𝑛=3) and kitchen garden (KG) soil samples (𝑛=3).

Samples	Fe in this work (mg kg^−1)	Cu in this work (mg kg^−1)	Zn certified value (mg kg^−1)	Zn with the D2 method (mg kg^−1)	Zn with the HSSR method (mg kg^−1)
BCR-483	26,642 ± 1,180^a	403 ± 11^c	987 ± 37^b,c	939 ± 48	1,013 ± 59
BCR-701	36,975 ± 342^d	43.8 ± 1.5^e	454 ± 19^f	474 ± 15	478 ± 7
KG1	22,496 ± 717	35.5±2.3		821 ± 10	808 ± 6
KG2	24,681 ± 799	25.6±1.9		513 ± 4	531 ± 7
KG3	23,628 ± 685	13.3±1.3		813 ± 15	958 ± 17
KG4	18,846 ± 578	78.2±3.1		867 ± 9	895 ± 1
KG5	20,026 ± 624	74.4±2.8		1,052 ± 21	1,051 ± 12
KG6	24,399 ± 790	63.3±2.3		1,398 ± 21	1,410 ± 24
KG7	18,851 ± 580	27.3±1.1		505 ± 3	522 ± 6
KG8	27,029 ± 890	170.4±5.4		4,502 ± 25	4,842 ± 54
KG9	31,440 ± 661	12.6±1.0		655 ± 5	667 ± 5

^aFrom Kubová et al. [38], [Fe] = 26,700 ± 480 mg kg⁻¹.
^bIndicative value from Rauret et al. [39], (𝑛=5).
^cFrom Pueyo et al. [40], [Zn] = 1,026 ± 37 mg kg⁻¹; [Cu] = 373 ± 14 mg kg⁻¹ (𝑛=6).
^dFrom Kubová et al. (2004) [38], [Fe] = 38,580 ± 220 mg kg⁻¹.
^eCertified value: [Cu] = 46.4±1.8 mg kg⁻¹ (𝑛=6).
^fFrom Pueyo et al. [40], [Zn] = 474 ± 10 mg kg⁻¹ (𝑛=6).