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             μ“√“ß∑’Ë 4 §à“ %recovery ∑’Ë√–¥—∫§«“¡‡¢â¡¢âπª“π°≈“ß (mid)

                               Control sample     Add       Found (§«“¡‡¢â¡¢âπ∑’Ë«—¥‰¥â)
              “√¡“μ√∞“π                                                               (%recovery)
                                   (ppm)         (ppm)              (ppm)

              “√ D                130.12         70.00             199.74               99.46
              “√ 1                142.57         75.00             216.35               98.37
              “√ 2                 32.64         67.00              99.43               99.69
              “√ 3                 60.39         73.5              133.81               99.89



             μ“√“ß∑’Ë 5 §à“ %recovery ∑’Ë√–¥—∫§«“¡‡¢â¡¢âπ Ÿß (high)

                                 Control sample      Add         Found (§«“¡‡¢â¡¢âπ
              “√¡“μ√∞“π                                                               (%recovery)
                                    (ppm)           (ppm)          ∑’Ë«—¥‰¥â) (ppm)

              “√ D                 130.12          140.00            268.33             98.72
              “√ 1                 142.57          150.00            290.39             98.55
              “√ 2                  32.64          134.00            165.89             99.44
              “√ 3                  60.39          147.00            205.98             99.04



                 ®“°º≈ % recovery ∑’ˉ¥â æ∫«à“ “√∑—Èß 4 ™π‘¥  μ“√“ß∑’Ë 6 §à“ precision (%RSD)
             ¡’§à“μ“¡™à«ßμàÕ‰ªπ’È
                                                                            Precisions (%RSD)
                     “√ D ¡’§à“ % recovery „π™à«ß 98.72-   “√
                                                                        Intra-day       Inter-day
             101.23%
                                                          “√ D           0.121           0.173
                     “√ 1 ¡’§à“ % recovery „π™à«ß 98.37-
                                                          “√ 1           0.245           0.369
             102%                                         “√ 2           0.195           0.332
                     “√ 2 ¡’§à“ % recovery „π™à«ß 99.44-   “√ 3          0.160           0.252

             99.85%
                    ·≈–  “√ 3 ¡’§à“ % recovery „π™à«ß 98.58-  μ“√“ß∑’Ë 7 §à“ LOQ ·≈– LOD ¢Õß°“√«‘‡§√“–Àå

             99.89%
                                                                     ¢’¥®”°—¥¢Õß       ¢’¥®”°—¥
                    3.3 Precision º≈°“√«‘‡§√“–Àå§à“ preci-
                                                          “√         °“√«‘‡§√“–Àå     ¢Õß°“√«—¥
             sion ¢Õß “√¡“μ√∞“π  “√ D °—∫ “√ 1, 2 ·≈– 3              (LOQ) (ppm.)    (LOD) (ppm.)

             · ¥ß¥—ßμ“√“ß∑’Ë 6
                                                          “√ D           4               1.2
                    3.4 Limit of Quantitation (LOQ) §à“   “√ 1          10               3.3
             ¢’¥®”°—¥¢Õß°“√«‘‡§√“–Àå ·≈– Limit of Detection   “√ 2       4               1.2
                                                          “√ 3           4               1.2
             (LOD) ¢’¥®”°—¥¢Õß°“√«—¥ À“‰¥â®“°™à«ß§«“¡‡¢â¡
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