Application Study Of Selective Electrode Carrier Based On Modified Molecular Sieves And Complex Containing Pharmaceutical Ingredients

The main researches of this paper include the following three parts:1.First,the HZSM-5A zeolite was loaded with surface active ionic liquid[C16MIm]Br(sixteen alkyl three methyl imidazolium bromide)to obtain modified zeolite SMZ.Then,use this modified molecular sieve as the ligand and DOP as plasticizer to prepare PVC membrane hydrogen phosphate root(HPO42-)selective electrode,and the best membrane composition is w(plasticizer): w(PVC): w(carrier)= 65:30:5.In this case,electrode shows a good response performance on HPO42-ion.The linear response range is 1.0×10-2~1.0×10-9mol/L;the response slope is-24.7mV/decade;the detection limit is about 4.09×10-10 mol/L.The electrode has the advantages of good selectivity and low detection limit,and can be successfully applied to the determination of phosphorus in lake water,pond water and tap water.2.Second,HZSM-5A zeolite was modified by using C8H16-CH=NH and C10H20-CH=NH as attached objects to obtain two kinds of modified zeolite SMZ-C8 and SMZ-C10.Then,use modified zeolite as carrier and DOP as plasticizer to prepare Pb2+ selective electrode.The response of the electrode is the best under the ratio of w(plasticizer): w(PVC): w(carrier)= 65:30:5.The response ranges of electrode to Pb2+were 1.0×10-2~1.0×10-6and 1.0×10-3~1.0×10-8mol/L,the response slopes were25.89 and 28.57 mV/decade,the detection limits were 5.89×10-7 and 6.08×10-9 mol/L.The electrodes have the ability to resist the interference of most metal cations and can be used in a certain range of pH.The two prepared electrodes can be successfully applied to the determination of lead ion in lake water,pond water and tap water and the measurement of residual residues of lead in soil,lotion,liquor and tea.3.Third,use benzalkonium chloride(BKC),Domiphen(DB)as raw materials to complex with NaBF4,NaTPB to synthesize two complexes [BK][BF4] and[DB][TPB].Then,use them as the carriers as well as DOP and DBP as plasticizer to develop a new PVC membrane [BK] and [DB] selective electrode.The optimum composition is w(plasticizer): w(PVC): w(carrier)= 66:33:1.The response ranges of the two prepared electrodes on BKC and DB were 1.0×10-2~1.0×10-6 mol/L and1.0×10-3~1.0×10-6mol/L,respectively;response slopes were 55.74 mV/decade and53.49 m V/decade,respectively;the detection limits were 5.38×10-7 mol/L and4.39×10-7 mol/L,respectively.The electrodes have good selectivity,strong anti-interference ability,and can be used in a certain range of pH.The prepared electrodes can be successfully applied to the determination of BKC in paper towels,milk and eye drops as well as the content of the moderate Domiphen Bromide Buccal Tablets cc.