Detector signal (in mV) Spiked ASA concentration Method 1 (in mg/L) Method 2 (35 C) (45 C) 0.25 20 18 21 25 23 28 0.5 33 31 32 41 38 39 1.0 44 48 45 91 87 95 2.0 71 75 73 136 145 139 4.0 125 119 131| 181 172 175