Minimizing Chloride Interferences Produced by Calcium Chloride in the Determination of Cd by Graphite Furnace Atomic Absorption Spectrometry

Table 3

Extractable Cd in 0.01 M CaCl₂ soil extracts (mean ± standard deviation (SD); 𝑛=6).

Samples	Fe in this work; (mg kg^−1)	As in this work; (μg kg^−1)	Cd; HSSR-BGC^a; (μg kg^−1)	Cd; D2-BGC; (μg kg^−1)	Cd; D2-BGC^a; (μg kg^−1)
BCR-483	0.98 ± 0.15	883 ± 30	482 ± 19^b,c	473 ± 19	ND
BCR-701	0.62 ± 0.07	65 ± 5	352 ± 6	349 ± 15	ND
BCR-141R	0.55 ± 0.03	18 ± 1	146 ± 5	113 ± 46	ND
NIST 2710a	14.10 ± 0.67	455 ± 46	3979 ± 58	4015 ± 60	ND
CS1	1.42 ± 0.16	1336 ± 157	2220 ± 9	2217 ± 6	2332 ± 10
CS2	0.12 ± 0.03	1467 ± 158	444 ± 9	443 ± 9	556 ± 18
CS3	2.91 ± 1.75	83 ± 9	145 ± 4	132 ± 10	447 ± 19
CS4	0.39 ± 0.04	1582 ± 57	139 ± 6	138 ± 9	147 ± 6
CS5	3.90 ± 0.38	192 ± 7	125 ± 9	120 ± 19	342 ± 10
CS6	3.94 ± 0.96	334 ± 35	114 ± 9	122 ± 9	287 ± 32
CS7	3.03 ± 0.26	77 ± 10	85 ± 10	73 ± 6	184 ± 10
CS8	0.39 ± 0.13	1515 ± 170	64 ± 6	66 ± 6	120 ± 19
CS9	4.27 ± 1.29	335 ± 24	54 ± 3	55 ± 3	161 ± 6
CS10	0.16 ± 0.03	1630 ± 89	39 ± 10	25 ± 12	289 ± 9
CS11	3.40 ± 0.80	64 ± 3	38 ± 3	20 ± 3	94 ± 9
CS12	5.30 ± 1.05	168 ± 7	32 ± 1	24 ± 5	67 ± 6
CS13	2.25 ± 0.33	111 ± 3	26.3 ± 0.7	20.2 ± 3.5	ND
CS14	3.56 ± 0.18	208 ± 5	23.6 ± 0.3	17.9 ± 3.1	ND
CS15	1.44 ± 0.26	151 ± 7	18.3 ± 0.5	13.2 ± 3.3	ND
CS16	1.92 ± 0.12	186 ± 6	16.7 ± 0.7	11.1 ± 2.9	ND
CS17	0.22 ± 0.08	81 ± 6	14.0 ± 0.7	9.3 ± 2.9	ND
CS18	0.53 ± 0.15	78 ± 4	13.3 ± 0.4	8.9 ± 1.8	ND
CS19	2.16 ± 0.30	62 ± 3	10.2 ± 0.2	6.3 ± 0.2	ND
CS20	0.81 ± 0.21	35 ± 3	7.4 ± 0.5	No value	ND
CS21	0.24 ± 0.08	12 ± 1	5.7 ± 0.3	No value	ND
CS22	0.12 ± 0.04	15 ± 1	3.3 ± 0.2	No value	ND

^aIn absence of chemical modifier.
^bIndicative value: [Cd] = 450 ± 50 μg kg⁻¹.
^cFrom Pueyo et al. (2004), [Cd] = 480 ± 10 μg kg⁻¹ (ICP-MS) [37].
ND: not determined.