04 42.7 31.3 0.37 0.055 15.5 0.57 0.23 0.12 3.27 0.36 0.069 0.15 0.072 0.48 18.1 four.87 7.80 0.51 9.78 21.3 0.39 0.034 104 sa,b r 0.01 0.002 0.01 0.01 0.01 0.05 0.001 0.03 0.02 0.01 0.01 0.01 0.01 0.001 0.01 0.five 0.2 0.two 0.3 1 two.0 0.six 0.037 0.001 0.two 0.01 0.01 0.01 0.01 0.01 0.001 0.01 0.001 0.01 0.3 0.39 0.06 0.Non-mobile fraction Contenta 0.23 0.003 0.12 0.041 0.022 0.57 0.043 0.073 0.37 0.041 0.035 0.022 0.12 0.036 0.14 20.two 20.0 5.20 1.79 1.76 0.50 6.18 0.067 0.015 2.92 0.15 0.032 0.090 0.24 0.046 0.035 0.16 0.021 0.24 0.64 0.45 1.00 0.12 1.68 4.60 0.13 0.003 20.2 sa,b r 0.01 0.001 0.01 0.001 0.002 0.01 0.001 0.002 0.01 0.005 0.001 0.001 0.01 0.001 0.01 0.1 0.three 0.02 0.01 0.04 0.01 0.32 0.001 0.001 0.01 0.01 0.001 0.001 0.01 0.003 0.001 0.01 0.001 0.01 0.01 0.01 0.01 0.Fraction sum

04 42.7 31.three 0.37 0.055 15.5 0.57 0.23 0.12 3.27 0.36 0.069 0.15 0.072 0.48 18.1 4.87 7.80 0.51 9.78 21.3 0.39 0.034 104 sa,b r 0.01 0.002 0.01 0.01 0.01 0.05 0.001 0.03 0.02 0.01 0.01 0.01 0.01 0.001 0.01 0.5 0.2 0.two 0.three 1 2.0 0.six 0.037 0.001 0.two 0.01 0.01 0.01 0.01 0.01 0.001 0.01 0.001 0.01 0.three 0.39 0.06 0.Non-mobile fraction Contenta 0.23 0.003 0.12 0.041 0.022 0.57 0.043 0.073 0.37 0.041 0.035 0.022 0.12 0.036 0.14 20.2 20.0 5.20 1.79 1.76 0.50 6.18 0.067 0.015 two.92 0.15 0.032 0.090 0.24 0.046 0.035 0.16 0.021 0.24 0.64 0.45 1.00 0.12 1.68 four.60 0.13 0.003 20.two sa,b r 0.01 0.001 0.01 0.001 0.002 0.01 0.001 0.002 0.01 0.005 0.001 0.001 0.01 0.001 0.01 0.1 0.3 0.02 0.01 0.04 0.01 0.32 0.001 0.001 0.01 0.01 0.001 0.001 0.01 0.003 0.001 0.01 0.001 0.01 0.01 0.01 0.01 0.Fraction sum Contentc 0.65 0.094 0.42 0.48 0.25 two.06 0.13 0.65 1.25 0.39 0.23 0.37 0.39 0.088 0.41 91.four 84.5 26.7 22.7 114 43.four 46.8 0.45 0.085 19.0 0.74 0.30 0.23 three.72 0.42 0.13 0.33 0.11 0.82 19.6 5.85 9.19 0.67 13.1 27.six 0.57 0.085 114 sd r 0.01 0.002 0.01 0.01 0.01 0.05 0.01 0.03 0.02 0.01 0.01 0.01 0.01 0.002 0.01 0.5 1.1 0.three 0.three 1 2.0 0.7 0.04 0.002 0.2 0.01 0.01 0.01 0.02 0.01 0.01 0.01 0.01 0.01 0.30 0.30 0.06 0.=3 full dissolution/analysis sequences for each and every sample. tandard deviation of repeatability. c um of mobile, semi-mobile and non-mobile fractions.Pyrazine-2,6-dicarboxylic acid site d ooled regular deviation of sum spooled = (s2 + s2 + s2)1/2. 1 2Frentiu et al. Chemistry Central Journal 2013, 7:178 http://journal.chemistrycentral/content/7/1/Page 6 ofAccording for the Bland and Altman test there is no significant bias among two sets of data when the confidence interval of your mean difference includes the zero value along with the distinction amongst measurements for every single sample lies in between the limits of agreement of the outcomes.2,2-Dimethyl-1,3-dioxan-5-one Chemscene Table two Results obtained for Hg determination (mg/kg) in certified reference materials by CV-CCP-OESReference material RTC-CRM048-50G LGC 6135 RTC-CRM 025-050 Certified value ?Ua 28.PMID:26780211 00 ?1.13 three.two ?0.4 99.eight ?31.7 1.20b Found worth ?Ua (n = five) 27.50 ?1.05 3.0 ?0.1 96.7 ?0.8 1.25 ?0.Assessment on the fractionation scheme of Hg species in soil and CV-CCP-OES analytical techniqueLGCa bThe Bland and Altman plots for Hg content material 1 mg/kg (24 samples) and 1 mg/kg (14 samples) are provided in Figure 2. For both concentration ranges the confidence interval on the negative/positive bias towards the sequential extraction included the zero value and the variations amongst all pairs of data had been within the reduce and upper limit of agreement. This has demonstrated that the variations between outcomes are random along with the 3-step sequential extraction performed in this study is suitable for Hg speciation in soil. The average recovery of Hg utilizing the sequential extraction was 100.5 ?3.3 for 95 self-confidence interval related to Hg determined in aqua regia. Accuracy of Hg determination by the CV-CCP-OES process was checked by analyzing certified reference materials (CRMs). The results obtained for the evaluation of 4 CRMs of soil (Table 2) show a recovery of 98.3 ?three.5 for Hg determined in soil by the CV-CCP-OES approach.Expanded uncertainty for 95 confidence interval. Indicative value.Results and discussionTotal Hg concentration and distribution of fractions(a)Difference (mg/kg)0.ten 0.08 0.06 0.04 0.02 0.00 -0.02 -0.04 -0.06 -0.08 -0.ten 0.0.-0.01?.-0.0.two 0.4 0.6 0.eight 1.Mean results (mg/kg)(b)Distinction (mg/kg)8.eight four 0 -4 -8 -12 0 20 40 60 80 100-8.43 0.14?.Mean benefits (mg/kg)Figure two Bland a.