ISO_NWIPs-for-Ballot

ISO/NP

203 204

3.33

free induction decay FID 205 An FID is the time domain signal that results from the application of a radio frequency pulse to a sample 206 in a static magnetic field 207 Note 1 to entry: This non-equilibrium magnetization can be induced by applying an RF pulse of sufficient 208 excitation band width and carrier frequency near the Larmor frequency of the nuclear spins. 209 3.34 210 number of transients 211 number of scans 212 number of times that an FT-NMR experiment is repeatedly co-added to improve the signal-to-noise 213 ratio of the NMR spectrum 214 215 3.35 216 Dummy scan 217 steady state scan 218 transient where radio frequency pulse is performed to establish a steady state but no data is acquired prior to the 219 acquisition of FID signals in FT-NMR 220 221 3.36 222 satellite signal 223 signals arising from fraction of sample containing another NMR active nucleus showing the coupling to 224 this nucleus. 225 226 3.37 227 system suitability test 228 routine testing to confirm the operational status of the analysis system and to verify in advance that the 229 test results of the applicable test method are suitable for the purpose 230 3.38 231 test for required detectability for system suitability test 232 verification that the SNR of the response is sufficiently high at the lowest detection level to ensure 233 reliable integration results. 234 3.39 235 system performance for system suitability test 236 verification that it is possible to specifically analyse the target species to the given specifications 237 3.40 238 system repeatability for system suitability test 239 confirmation of the extent of variation in test results across repeated measurements 240 3.41 241 zero filling 242 insertion of zero values at the end of an FID signal; a means of increasing the digital resolution of FT- 243 NMR spectra 244 3.42 245 baseline correction 246 mathematical procedure used to correct distortion in the baseline of an NMR spectrum 247

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