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Table 3

Sulfate, sulfite, and thiosulfate interference examination

Content SpeciesMeasurement mean and SD (mg S)
RSD (%, n = 3)
Recovery rate (%)
100502510050251005025
Na2SO4 2.95 ± 0.10 2.77 ± 0.01 2.34 ± 0.06 3.30 0.40 2.56 2.95 5.54 9.35 
CaSO4 11.65 ± 0.01 6.52 ± 0.01 4.45 ± 0.02 0.07 0.16 0.34 11.65 13.03 17.82 
Na2SO3 2.39 ± 0.02 1.82 ± 0.08 1.29 ± 0.04 0.80 4.21 3.24 2.39 3.62 5.14 
Na2S2O3 80.04 ± 0.12 34.83 ± 0.06 18.62 ± 0.04 0.15 0.17 0.23 80.10 69.62 74.34 
Content SpeciesMeasurement mean and SD (mg S)
RSD (%, n = 3)
Recovery rate (%)
100502510050251005025
Na2SO4 2.95 ± 0.10 2.77 ± 0.01 2.34 ± 0.06 3.30 0.40 2.56 2.95 5.54 9.35 
CaSO4 11.65 ± 0.01 6.52 ± 0.01 4.45 ± 0.02 0.07 0.16 0.34 11.65 13.03 17.82 
Na2SO3 2.39 ± 0.02 1.82 ± 0.08 1.29 ± 0.04 0.80 4.21 3.24 2.39 3.62 5.14 
Na2S2O3 80.04 ± 0.12 34.83 ± 0.06 18.62 ± 0.04 0.15 0.17 0.23 80.10 69.62 74.34 
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