water samples. While, in the case of beverage samples, a standard
addition procedure was performed to accurately analyze each
sample with matrix-matching between samples and standards. In
addition, the in-line sample dilution was achieved by varying the
volume of sample and water. Nevertheless, the sample throughput
of the standard addition procedure was only 6 samples per hour.
The operational sequences for these SI-monosegmented flow
approaches were presented in Fig. 2. Samples were also analyzed
by the ICP-AES method for comparison. The obtained results are
presented in Tables 5 and 6. According to t-test at 95% confident
limit, the results obtained from both methods were in good
agreement (tcritical = 2.11, tcalculate = 1.79). The results correlated
well with each other (SI = 0.931 ICP + 0.0133, R2 = 0.9881). The
satisfactory recoveries in range of 94–104% for water samples and