Homework Solution: a) Horvat and co-workers used atomic absorption spectroscopy to determine the…

    a) Horvat and co-workers used atomic absorption spectroscopy to determine the concentration of Hg in coal fly ash.22 Of particular interest to the authors was developing an appropriate procedure for digesting samples and releasing the Hg for analysis. As part of their study they tested several reagents for digesting samples. Their results using HNO3 and using a 1 + 3 mixture of HNO3 and HCl are shown here. All concentrations are given as ppb Hg sample. HNO3: 161 165 160 167 166 1+3 HNO3–HCl: 159 145 140 147 143 156 Determine whether there is a significant difference between these methods at a = 0.05. B)  Mizutani, Yabuki and Asai developed an electrochemical method for analyzing l-malate.27 As part of their study they analyzed a series of beverages using both their method and a standard spectrophotometric procedure based on a clinical kit purchased from Boerhinger Scientific. The following table summarizes their results. All values are in ppm.
    Sample Electrode spectrophotometric
    Apple Juice 1 34 33.4
    Apple Juice 2 22.6 28.4
    Apple Juice 3 29.7 29.5
    Apple Juice 4 24.9 24.8
    Grape Juice 1 17.8 18.3
    Grape Juice 2 14.8 15.4
    Mixed fruit Juice 8.6 8.5
    Mixed fruit Juice 31.4 31.9
    White wine 1 10.8 11.5
    White wine 2 17.3 17.6
    White wine 3 15.7 15.4
    White wine 4 18.4 18.3 Determine whether there is a significant difference between the methods at a = 0.05.

    Expert Answer

    a) Horvat and co-workers used ultimate aridity spectroscopy to designate the ardor of Hg in coal hasten ash.22 Of feature cause to the authors was developing an mismisappropriate proceeding restraint digesting patterns and releasing the Hg restraint dissection. As disunite of their examine they tested different reagents restraint digesting patterns. Their results using HNO3 and using a 1 + 3 structure of HNO3 and HCl are shown here. All ardors are attached as ppb Hg pattern.

    HNO3: 161 165 160 167 166

    1+3 HNO3–HCl: 159 145 140 147 143 156

    Designate whether there is a telling unlikeness among these arrangements at a = 0.05.

    B)  Mizutani, Yabuki and Asai exposed an electrochemical arrangement restraint analyzing l-malate.27 As disunite of their examine they analyzed a succession of beverages using twain their arrangement and a banner spectrophotometric proceeding based on a clinical kit purchased from Boerhinger Scientific. The forthcoming consideration summarizes their results. All values are in ppm.

    Sample Electrode spectrophotometric Apple Juice 1 34 33.4 Apple Juice 2 22.6 28.4 Apple Juice 3 29.7 29.5 Apple Juice 4 24.9 24.8 Grape Juice 1 17.8 18.3 Grape Juice 2 14.8 15.4 Mixed consequence Juice 8.6 8.5 Mixed consequence Juice 31.4 31.9 White wine 1 10.8 11.5 White wine 2 17.3 17.6 White wine 3 15.7 15.4 White wine 4 18.4 18.3

    Designate whether there is a telling unlikeness among the arrangements at a = 0.05.

    Expert Vindication