JP6160281B2 - カラム用充填材 - Google Patents
カラム用充填材 Download PDFInfo
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- JP6160281B2 JP6160281B2 JP2013124695A JP2013124695A JP6160281B2 JP 6160281 B2 JP6160281 B2 JP 6160281B2 JP 2013124695 A JP2013124695 A JP 2013124695A JP 2013124695 A JP2013124695 A JP 2013124695A JP 6160281 B2 JP6160281 B2 JP 6160281B2
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- 238000012856 packing Methods 0.000 title claims description 32
- 239000000463 material Substances 0.000 title claims description 22
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- 239000000178 monomer Substances 0.000 description 61
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- NZIDBRBFGPQCRY-UHFFFAOYSA-N octyl 2-methylprop-2-enoate Chemical compound CCCCCCCCOC(=O)C(C)=C NZIDBRBFGPQCRY-UHFFFAOYSA-N 0.000 description 3
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- 239000003381 stabilizer Substances 0.000 description 3
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- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical class C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 2
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- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 1
- 239000004641 Diallyl-phthalate Substances 0.000 description 1
- SNRUBQQJIBEYMU-UHFFFAOYSA-N Dodecane Natural products CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 239000004354 Hydroxyethyl cellulose Substances 0.000 description 1
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 150000000996 L-ascorbic acids Chemical class 0.000 description 1
- YIVJZNGAASQVEM-UHFFFAOYSA-N Lauroyl peroxide Chemical compound CCCCCCCCCCCC(=O)OOC(=O)CCCCCCCCCCC YIVJZNGAASQVEM-UHFFFAOYSA-N 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 1
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- 229910019142 PO4 Inorganic materials 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 description 1
- BCKXLBQYZLBQEK-KVVVOXFISA-M Sodium oleate Chemical compound [Na+].CCCCCCCC\C=C/CCCCCCCC([O-])=O BCKXLBQYZLBQEK-KVVVOXFISA-M 0.000 description 1
- ULUAUXLGCMPNKK-UHFFFAOYSA-N Sulfobutanedioic acid Chemical class OC(=O)CC(C(O)=O)S(O)(=O)=O ULUAUXLGCMPNKK-UHFFFAOYSA-N 0.000 description 1
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 description 1
- ORLQHILJRHBSAY-UHFFFAOYSA-N [1-(hydroxymethyl)cyclohexyl]methanol Chemical class OCC1(CO)CCCCC1 ORLQHILJRHBSAY-UHFFFAOYSA-N 0.000 description 1
- KYIKRXIYLAGAKQ-UHFFFAOYSA-N abcn Chemical compound C1CCCCC1(C#N)N=NC1(C#N)CCCCC1 KYIKRXIYLAGAKQ-UHFFFAOYSA-N 0.000 description 1
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000001261 affinity purification Methods 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 150000001338 aliphatic hydrocarbons Chemical class 0.000 description 1
- 150000003973 alkyl amines Chemical class 0.000 description 1
- 150000001346 alkyl aryl ethers Chemical class 0.000 description 1
- 150000005215 alkyl ethers Chemical class 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- BTBJBAZGXNKLQC-UHFFFAOYSA-N ammonium lauryl sulfate Chemical compound [NH4+].CCCCCCCCCCCCOS([O-])(=O)=O BTBJBAZGXNKLQC-UHFFFAOYSA-N 0.000 description 1
- 229940063953 ammonium lauryl sulfate Drugs 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 235000010323 ascorbic acid Nutrition 0.000 description 1
- QUDWYFHPNIMBFC-UHFFFAOYSA-N bis(prop-2-enyl) benzene-1,2-dicarboxylate Chemical compound C=CCOC(=O)C1=CC=CC=C1C(=O)OCC=C QUDWYFHPNIMBFC-UHFFFAOYSA-N 0.000 description 1
- 239000001506 calcium phosphate Substances 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 239000004359 castor oil Substances 0.000 description 1
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- 125000002091 cationic group Chemical group 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 235000010980 cellulose Nutrition 0.000 description 1
- 125000004218 chloromethyl group Chemical group [H]C([H])(Cl)* 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- HPXRVTGHNJAIIH-UHFFFAOYSA-N cyclohexanol Chemical compound OC1CCCCC1 HPXRVTGHNJAIIH-UHFFFAOYSA-N 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 150000001993 dienes Chemical class 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 235000019329 dioctyl sodium sulphosuccinate Nutrition 0.000 description 1
- YHAIUSTWZPMYGG-UHFFFAOYSA-L disodium;2,2-dioctyl-3-sulfobutanedioate Chemical compound [Na+].[Na+].CCCCCCCCC(C([O-])=O)(C(C([O-])=O)S(O)(=O)=O)CCCCCCCC YHAIUSTWZPMYGG-UHFFFAOYSA-L 0.000 description 1
- 238000012674 dispersion polymerization Methods 0.000 description 1
- LQZZUXJYWNFBMV-UHFFFAOYSA-N dodecan-1-ol Chemical compound CCCCCCCCCCCCO LQZZUXJYWNFBMV-UHFFFAOYSA-N 0.000 description 1
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 description 1
- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- DDXLVDQZPFLQMZ-UHFFFAOYSA-M dodecyl(trimethyl)azanium;chloride Chemical compound [Cl-].CCCCCCCCCCCC[N+](C)(C)C DDXLVDQZPFLQMZ-UHFFFAOYSA-M 0.000 description 1
- HBRNMIYLJIXXEE-UHFFFAOYSA-N dodecylazanium;acetate Chemical compound CC(O)=O.CCCCCCCCCCCCN HBRNMIYLJIXXEE-UHFFFAOYSA-N 0.000 description 1
- SYELZBGXAIXKHU-UHFFFAOYSA-N dodecyldimethylamine N-oxide Chemical compound CCCCCCCCCCCC[N+](C)(C)[O-] SYELZBGXAIXKHU-UHFFFAOYSA-N 0.000 description 1
- 239000003480 eluent Substances 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 238000007720 emulsion polymerization reaction Methods 0.000 description 1
- UIWXSTHGICQLQT-UHFFFAOYSA-N ethenyl propanoate Chemical compound CCC(=O)OC=C UIWXSTHGICQLQT-UHFFFAOYSA-N 0.000 description 1
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- XUCNUKMRBVNAPB-UHFFFAOYSA-N fluoroethene Chemical compound FC=C XUCNUKMRBVNAPB-UHFFFAOYSA-N 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- ZEMPKEQAKRGZGQ-XOQCFJPHSA-N glycerol triricinoleate Natural products CCCCCC[C@@H](O)CC=CCCCCCCCC(=O)OC[C@@H](COC(=O)CCCCCCCC=CC[C@@H](O)CCCCCC)OC(=O)CCCCCCCC=CC[C@H](O)CCCCCC ZEMPKEQAKRGZGQ-XOQCFJPHSA-N 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- HCDGVLDPFQMKDK-UHFFFAOYSA-N hexafluoropropylene Chemical group FC(F)=C(F)C(F)(F)F HCDGVLDPFQMKDK-UHFFFAOYSA-N 0.000 description 1
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 1
- LNCPIMCVTKXXOY-UHFFFAOYSA-N hexyl 2-methylprop-2-enoate Chemical compound CCCCCCOC(=O)C(C)=C LNCPIMCVTKXXOY-UHFFFAOYSA-N 0.000 description 1
- LNMQRPPRQDGUDR-UHFFFAOYSA-N hexyl prop-2-enoate Chemical compound CCCCCCOC(=O)C=C LNMQRPPRQDGUDR-UHFFFAOYSA-N 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004811 liquid chromatography Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000002609 medium Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 125000005641 methacryl group Chemical group 0.000 description 1
- 125000005395 methacrylic acid group Chemical group 0.000 description 1
- AWJZTPWDQYFQPQ-UHFFFAOYSA-N methyl 2-chloroprop-2-enoate Chemical compound COC(=O)C(Cl)=C AWJZTPWDQYFQPQ-UHFFFAOYSA-N 0.000 description 1
- KKFHAJHLJHVUDM-UHFFFAOYSA-N n-vinylcarbazole Chemical compound C1=CC=C2N(C=C)C3=CC=CC=C3C2=C1 KKFHAJHLJHVUDM-UHFFFAOYSA-N 0.000 description 1
- PSZYNBSKGUBXEH-UHFFFAOYSA-M naphthalene-1-sulfonate Chemical compound C1=CC=C2C(S(=O)(=O)[O-])=CC=CC2=C1 PSZYNBSKGUBXEH-UHFFFAOYSA-M 0.000 description 1
- 150000002826 nitrites Chemical class 0.000 description 1
- UPHWVVKYDQHTCF-UHFFFAOYSA-N octadecylazanium;acetate Chemical compound CC(O)=O.CCCCCCCCCCCCCCCCCCN UPHWVVKYDQHTCF-UHFFFAOYSA-N 0.000 description 1
- OTLDLKLSNZMTTA-UHFFFAOYSA-N octahydro-1h-4,7-methanoindene-1,5-diyldimethanol Chemical compound C1C2C3C(CO)CCC3C1C(CO)C2 OTLDLKLSNZMTTA-UHFFFAOYSA-N 0.000 description 1
- TVMXDCGIABBOFY-UHFFFAOYSA-N octane Chemical compound CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 150000001451 organic peroxides Chemical class 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- HDBWAWNLGGMZRQ-UHFFFAOYSA-N p-Vinylbiphenyl Chemical compound C1=CC(C=C)=CC=C1C1=CC=CC=C1 HDBWAWNLGGMZRQ-UHFFFAOYSA-N 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- WRAQQYDMVSCOTE-UHFFFAOYSA-N phenyl prop-2-enoate Chemical compound C=CC(=O)OC1=CC=CC=C1 WRAQQYDMVSCOTE-UHFFFAOYSA-N 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 150000008301 phosphite esters Chemical class 0.000 description 1
- 229920001515 polyalkylene glycol Polymers 0.000 description 1
- 150000008442 polyphenolic compounds Chemical class 0.000 description 1
- 235000013824 polyphenols Nutrition 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 description 1
- PNXMTCDJUBJHQJ-UHFFFAOYSA-N propyl prop-2-enoate Chemical compound CCCOC(=O)C=C PNXMTCDJUBJHQJ-UHFFFAOYSA-N 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 description 1
- 235000019333 sodium laurylsulphate Nutrition 0.000 description 1
- 235000019832 sodium triphosphate Nutrition 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical class [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 1
- 150000003457 sulfones Chemical class 0.000 description 1
- 125000000542 sulfonic acid group Chemical group 0.000 description 1
- 238000006557 surface reaction Methods 0.000 description 1
- 238000010558 suspension polymerization method Methods 0.000 description 1
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 1
- 229940078499 tricalcium phosphate Drugs 0.000 description 1
- 229910000391 tricalcium phosphate Inorganic materials 0.000 description 1
- 235000019731 tricalcium phosphate Nutrition 0.000 description 1
- QXJQHYBHAIHNGG-UHFFFAOYSA-N trimethylolethane Chemical compound OCC(C)(CO)CO QXJQHYBHAIHNGG-UHFFFAOYSA-N 0.000 description 1
- 238000001132 ultrasonic dispersion Methods 0.000 description 1
- KOZCZZVUFDCZGG-UHFFFAOYSA-N vinyl benzoate Chemical compound C=COC(=O)C1=CC=CC=C1 KOZCZZVUFDCZGG-UHFFFAOYSA-N 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 235000013343 vitamin Nutrition 0.000 description 1
- 239000011782 vitamin Substances 0.000 description 1
- 229940088594 vitamin Drugs 0.000 description 1
- 229930003231 vitamin Natural products 0.000 description 1
- 150000003722 vitamin derivatives Chemical class 0.000 description 1
- 239000003021 water soluble solvent Substances 0.000 description 1
- 229920003169 water-soluble polymer Polymers 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Images
Landscapes
- Polymerisation Methods In General (AREA)
- Graft Or Block Polymers (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Description
A<0.1177×B …(1)
[式中、Aは半値幅を示し、Bは極大粒径を示す。]
また、上記各峰における、粒子の分散性を示すCV値(Coefficient of Variation)が、それぞれ5%以下であると好ましい。
さらに、上記粒度分布が二峰性であると好ましい。二峰性とは、粒度分布において極大粒径が2つであることをいう。また、上記多孔質ポリマー粒子が、2種類のブレンドからなるカラム用充填材とすると好ましい。
また、上記多孔質ポリマー粒子が、シード重合により合成されたものであると好ましい。シード重合で粒子を合成すると、本発明の多孔質ポリマー粒子に適した単分散性の粒子が得られやすい。
本実施形態に係るカラム用充填材における多孔質ポリマー粒子は、例えば、シード重合法によって得ることができる。具体的には、シード粒子をモノマー、多孔化剤(多孔質剤)及び水性媒体を含む乳化液中で膨潤させた後、モノマーを重合させることにより得ることができる。
シード粒子としては、特に限定されないが、例えば、アクリル系粒子、スチレン系粒子等のビニル系樹脂粒子が挙げられる。
CV(%)=(σ/D)×100
σ:標準偏差、D:平均粒径
このCV値が小さいほどより単分散であることを示す。一般的にCV値が10%以下になると単分散性が高いとされており、上記の5%以下はきわめて高い単分散性であることを示す。
乳化液に用いられるモノマーとして、例えば、以下の多官能性モノマー、単官能性モノマー等が挙げられる。
多孔質剤(多孔化剤)としては、例えば、シード重合時に相分離剤として作用し、粒子の多孔質化を促進する有機溶媒である脂肪族又は芳香族の炭化水素類、エステル類、ケトン類、エーテル類、アルコール類が挙げられる。具体的には、トルエン、キシレン、ジエチルベンゼン、シクロヘキサン、オクタン、酢酸ブチル、フタル酸ジブチル、メチルエチルケトン、ジブチルエーテル、1−ヘキサノール、2−オクタノール、デカノール、ラウリルアルコール、シクロヘキサノール等が挙げられ、これらを単独で、又は2種以上を混合して用いることができる。
水性媒体としては、水、又は水と水溶性溶媒(例えば、低級アルコール)との混合媒体が挙げられる。水性媒体には、界面活性剤が含まれている。界面活性剤としては、アニオン系、カチオン系、ノニオン系及び両性イオン系の界面活性剤のうち、いずれも用いることができる。
A<0.1177×B …(1)
[式中、Aは半値幅を示し、Bは極大粒径を示す。]
500mLの三口フラスコに、スチレン(ST)40g、オクタンチオール(OCT)4g、ペルオキソ二硫酸カリウム(KPS)1.98g及び水400gを一括して仕込み、70℃のウォーターバスで加熱しながら、攪拌機を用いて約8時間攪拌をして、シード粒子1を形成させた。
500mLの三口フラスコに、スチレン(ST)40g、オクタンチオール(OCT)4g、過酸化ベンゾイル(BPO)2g及び水340gを一括して仕込み、超音波ホモジナイザーで乳化後、シード粒子1を固形分換算で0.4g投入し、8時間攪拌し、シード粒子1を膨潤させた。続いて、80℃に昇温し、約8時間攪拌をして、平均粒径3μmのシード粒子を形成させた。
重合開始剤として過酸化ベンゾイル1g、モノマーとしてスチレン10g及びジビニルベンゼン2.5g、並びに多孔質剤としてトルエン3.75g及びジエチルベンゼン3.75gを、溶媒(イオン交換水92.2質量%、エタノール7.5質量%、及び界面活性剤としてエマールTD(ラウリル硫酸トリエタノールアミン、花王株式会社製)0.3質量%を混合したもの)340gに分散し、ホモジナイザーと超音波照射で10分間処理し、乳化を行い、乳化液を得た。得られた乳化液にシード粒子1を固形分換算で0.47g添加した後、20時間膨潤を行った。その後、80℃に昇温し、8時間重合を行った。重合終了後、得られた粒子を水及びメタノールで洗浄した。
シード粒子1の量を0.10gに変更した以外は多孔質ポリマー粒子1の合成と同様にして多孔質ポリマー粒子2を合成した。
シード粒子1の量を0.07gに変更した以外は多孔質ポリマー粒子1の合成と同様にして多孔質ポリマー粒子3を合成した。
シード粒子1の量を0.05gに変更した以外は多孔質ポリマー粒子1の合成と同様にして多孔質ポリマー粒子4を合成した。
シード粒子1の量を0.03gに変更した以外は多孔質ポリマー粒子1の合成と同様にして多孔質ポリマー粒子5を合成した。
重合開始剤として過酸化ベンゾイル1g、モノマーとしてスチレン10g及びジビニルベンゼン2.5g、並びに多孔質剤としてトルエン3.75g及びジエチルベンゼン3.75gを、溶媒(イオン交換水92.2質量%、エタノール7.5質量%、及び界面活性剤としてエマールTD0.3質量%)340gに分散し、リン酸三カルシウム10質量%水溶液100gを添加し、ホモミキサーで30分間攪拌した。その後、80℃に昇温し、8時間懸濁重合を行った。得られた粒子を水及びメタノールで洗浄後、メッシュ分級を行い、粒子を作製した。得られた粒子に対し多孔質ポリマー粒子1と同様にスルホン化を行い、多孔質ポリマー粒子6を作製した。
A<0.1177×B …(1)
[式中、Aは半値幅を示し、Bは極大粒径を示す。]
実施例及び比較例で得られた多孔質ポリマー粒子の混合物を、直径7.8mm、長さ150mmのステンレスカラムに、充填溶媒0.1質量%リン酸、スラリー濃度50%、充填圧15MPa、充填時間30分の条件で充填した。充填したカラムを用い、溶離液0.1質量%リン酸水溶液、カラム温度25℃、流速0.5ml/min、サンプル3.5質量%ギ酸、サンプル量2μL、検出器UV210nmの測定条件で、クロマト特性を測定した。クロマト測定により、解析ソフトを用いて理論段数を求め粒子特性の指標とした。また、ギ酸のピーク対称度を測定し、1以上1.2未満を良好、1.2以上をテーリング、1未満をリーディングと判定した。
Claims (5)
- 多孔質ポリマー粒子を含有するカラム用充填材であって、
多孔質ポリマー粒子の粒度分布が多峰性であり、各峰に含まれる多孔質ポリマー粒子が、多孔質ポリマー粒子全量に対してそれぞれ10質量%以上であり、かつ各峰における半値幅及び極大粒径が、式(1)で表される要件を満たし、多孔質ポリマー粒子が、シード重合により合成されたものである、カラム用充填材。
A<0.1177×B …(1)
[式中、Aは半値幅を示し、Bは極大粒径を示す。] - 前記各峰における極大粒径と前記各峰のうち最も個数比が大きい峰の極大粒径との差は、前記各峰のうち最も個数比が大きい峰の極大粒径の値の1/5以上である、請求項1に記載のカラム用充填材。
- 前記各峰におけるCV値が、それぞれ5%以下である、請求項1又は2に記載のカラム用充填材。
- 多孔質ポリマー粒子が、スチレン−ジビニルベンゼンを含む、請求項1〜3のいずれか一項に記載のカラム用充填材。
- 前記粒度分布が二峰性である、請求項1〜4のいずれか一項に記載のカラム用充填材。
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