Page 275 - Analytical method for food addtives
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182  Analytical methods for food additives


              Table 14.3  Performance characteristics for adipic acid in orange drink samples 1
              Sample                             Orange drink
              Analyte                             Adipic acid
              No. of laboratories                    6
              Units                                 ppm
              Spike value                           125
              Results            116.3       124.5       114.3       116.7       118.5       116.0
              Mean value                            117.7
              SD                                    3.586
              CV                                   3.05 %



              Table 14.4  Performance characteristics for adipic acid in acetylated adipyl cross-linked
              starches 8

              Total adipate
              Sample           557/664   455/006   556/161   041/551   545/949
              Analyte         adipic acid  adipic acid  adipic acid  adipic acid  adipic acid
              No. of laboratories  9       9         9         9          9
              Units             mg/kg    mg/kg     mg/kg      mg/kg     mg/kg
              Mean value         430      386       659        90        405
              S                  22        21        36        5          7
               r
              S                  50        32        62        11        40
               R
              Free adipic acid
              Sample           557/664   455/006   556/161   041/551   545/949
              Analyte         adipic acid  adipic acid  adipic acid  adipic acid  adipic acid
              No. of laboratories  9       9         9         9          9
              Units             mg/kg    mg/kg     mg/kg      mg/kg     mg/kg
              Mean value        32.6      109.6     17.8      14.6       99.9
              S                  3.4      6.0        2.0       2.3       2.5
               r
              S                 11.4      29.2       6.3       6.0       31.2
               R
              Key
              Mean  The observed mean. The mean obtained from the collaborative trial data.
              S     The standard deviation of the repeatability.
               r
              S     The standard deviation of the reproducibility.
               R
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