| 摘要 |
<p>A copolymer (C1) of methacrylic acid (a1) and ethylene glycol dimethacrylate (a2) and optionally a third monomer (a3), is new. Independent claims are also included for: (1) preparation of (C1) involving polymerizing (a1) and (a2) and optionally (a3) in an aqueous polyvinyl alcohol solution; (2) an adsorbent or a concentrating medium comprising (C1); (3) a loop used in an injector for chromatography (where the loop is packed with the adsorbent or the concentrating medium); (4) a needle for solid-phase microextraction (SPME) (where the needle is packed with the adsorbent with the adsorbent or concentrating medium); (5) a kit for the preparation of a sample to be analyzed comprising the needle for SPME, a syringe having a large volume and a syringe having a small volume; (6) a method for concentrating a sample involving (X) and/or (Y): (a) (X), comprising aspirating the sample into the large volume syringe of the kit to adsorb an analyte present in the sample on the adsorbent or concentrating medium within the needle for SPME and thus concentrating the analyte present in the sample; and/or (b) (Y), comprising: (i) substituting the small volume syringe for the large volume syringe; (ii) inserting the needle for SPME into a sample-injection port of a chromatograph; (iii) passing an elution medium fed from the small volume syringe through the needle to thus elute the analyte adsorbed on the adsorbent or concentrating medium; and (iv) injecting the eluted analyte into the chromatograph through its sample-injection port to thus carry out the chromatography analysis.</p> |
