JP5145916B2 - ポーラログラフ式隔膜型電極用電解液およびポーラログラフ式隔膜型電極 - Google Patents
ポーラログラフ式隔膜型電極用電解液およびポーラログラフ式隔膜型電極 Download PDFInfo
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- JP5145916B2 JP5145916B2 JP2007326331A JP2007326331A JP5145916B2 JP 5145916 B2 JP5145916 B2 JP 5145916B2 JP 2007326331 A JP2007326331 A JP 2007326331A JP 2007326331 A JP2007326331 A JP 2007326331A JP 5145916 B2 JP5145916 B2 JP 5145916B2
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- 239000003792 electrolyte Substances 0.000 title claims description 18
- 238000005260 corrosion Methods 0.000 claims description 41
- 230000007797 corrosion Effects 0.000 claims description 40
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 29
- 239000003112 inhibitor Substances 0.000 claims description 17
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 claims description 16
- 229910001220 stainless steel Inorganic materials 0.000 claims description 15
- 239000010935 stainless steel Substances 0.000 claims description 15
- 239000001103 potassium chloride Substances 0.000 claims description 14
- 235000011164 potassium chloride Nutrition 0.000 claims description 14
- 239000001509 sodium citrate Substances 0.000 claims description 8
- WXMKPNITSTVMEF-UHFFFAOYSA-M sodium benzoate Chemical compound [Na+].[O-]C(=O)C1=CC=CC=C1 WXMKPNITSTVMEF-UHFFFAOYSA-M 0.000 claims description 5
- 239000004299 sodium benzoate Substances 0.000 claims description 5
- 235000010234 sodium benzoate Nutrition 0.000 claims description 5
- 239000001508 potassium citrate Substances 0.000 claims description 4
- 229960002635 potassium citrate Drugs 0.000 claims description 4
- QEEAPRPFLLJWCF-UHFFFAOYSA-K potassium citrate (anhydrous) Chemical compound [K+].[K+].[K+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O QEEAPRPFLLJWCF-UHFFFAOYSA-K 0.000 claims description 4
- 235000011082 potassium citrates Nutrition 0.000 claims description 4
- 235000011083 sodium citrates Nutrition 0.000 claims description 3
- 239000008151 electrolyte solution Substances 0.000 description 26
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 22
- 229910052760 oxygen Inorganic materials 0.000 description 22
- 239000001301 oxygen Substances 0.000 description 22
- 239000000203 mixture Substances 0.000 description 8
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 7
- 239000000243 solution Substances 0.000 description 7
- 239000010408 film Substances 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 4
- 239000012670 alkaline solution Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052697 platinum Inorganic materials 0.000 description 3
- 150000007519 polyprotic acids Polymers 0.000 description 3
- PJAHUDTUZRZBKM-UHFFFAOYSA-K potassium citrate monohydrate Chemical compound O.[K+].[K+].[K+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O PJAHUDTUZRZBKM-UHFFFAOYSA-K 0.000 description 3
- 230000004043 responsiveness Effects 0.000 description 3
- 229910052709 silver Inorganic materials 0.000 description 3
- 239000004332 silver Substances 0.000 description 3
- 230000001954 sterilising effect Effects 0.000 description 3
- 238000004659 sterilization and disinfection Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 229920006015 heat resistant resin Polymers 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- 239000012488 sample solution Substances 0.000 description 2
- -1 silver ions Chemical class 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- WBYWAXJHAXSJNI-VOTSOKGWSA-M .beta-Phenylacrylic acid Natural products [O-]C(=O)\C=C\C1=CC=CC=C1 WBYWAXJHAXSJNI-VOTSOKGWSA-M 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- WBYWAXJHAXSJNI-SREVYHEPSA-N Cinnamic acid Chemical compound OC(=O)\C=C/C1=CC=CC=C1 WBYWAXJHAXSJNI-SREVYHEPSA-N 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 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
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910021538 borax Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 239000013522 chelant Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229930016911 cinnamic acid Natural products 0.000 description 1
- 235000013985 cinnamic acid Nutrition 0.000 description 1
- 229960004106 citric acid Drugs 0.000 description 1
- 235000015165 citric acid Nutrition 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- WBYWAXJHAXSJNI-UHFFFAOYSA-N methyl p-hydroxycinnamate Natural products OC(=O)C=CC1=CC=CC=C1 WBYWAXJHAXSJNI-UHFFFAOYSA-N 0.000 description 1
- 239000002444 monopotassium citrate Substances 0.000 description 1
- 235000015861 monopotassium citrate Nutrition 0.000 description 1
- WKZJASQVARUVAW-UHFFFAOYSA-M potassium;hydron;2-hydroxypropane-1,2,3-tricarboxylate Chemical compound [K+].OC(=O)CC(O)(C(O)=O)CC([O-])=O WKZJASQVARUVAW-UHFFFAOYSA-M 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 239000012047 saturated solution Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 229960000999 sodium citrate dihydrate Drugs 0.000 description 1
- 239000011684 sodium molybdate Substances 0.000 description 1
- 235000015393 sodium molybdate Nutrition 0.000 description 1
- TVXXNOYZHKPKGW-UHFFFAOYSA-N sodium molybdate (anhydrous) Chemical compound [Na+].[Na+].[O-][Mo]([O-])(=O)=O TVXXNOYZHKPKGW-UHFFFAOYSA-N 0.000 description 1
- 239000001488 sodium phosphate Substances 0.000 description 1
- 229910000162 sodium phosphate Inorganic materials 0.000 description 1
- 235000011008 sodium phosphates Nutrition 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 235000019794 sodium silicate Nutrition 0.000 description 1
- 235000010339 sodium tetraborate Nutrition 0.000 description 1
- XMVONEAAOPAGAO-UHFFFAOYSA-N sodium tungstate Chemical compound [Na+].[Na+].[O-][W]([O-])(=O)=O XMVONEAAOPAGAO-UHFFFAOYSA-N 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000003115 supporting electrolyte Substances 0.000 description 1
- BSVBQGMMJUBVOD-UHFFFAOYSA-N trisodium borate Chemical compound [Na+].[Na+].[Na+].[O-]B([O-])[O-] BSVBQGMMJUBVOD-UHFFFAOYSA-N 0.000 description 1
- HRXKRNGNAMMEHJ-UHFFFAOYSA-K trisodium citrate Chemical compound [Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O HRXKRNGNAMMEHJ-UHFFFAOYSA-K 0.000 description 1
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 1
- POZPMIFKBAEGSS-UHFFFAOYSA-K trisodium;2-hydroxypropane-1,2,3-tricarboxylate;trihydrate Chemical compound O.O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O POZPMIFKBAEGSS-UHFFFAOYSA-K 0.000 description 1
Images
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- Preventing Corrosion Or Incrustation Of Metals (AREA)
Description
カソード(Pt) O2+2H20+4e− → 4OH− …(1)
アノード(Ag) 4Ag+4Cl− → 4AgCl+4e− …(2)
上記反応における平衡起電力は小さいので、外部から0.6〜0.7V程度の一定電圧を印加する。
(a)ポーラログラフ式溶存酸素電極では、反応式(2)のように、アノードで銀イオンと塩化物イオンとの反応を生じさせるため、電解液として一般的にKCl溶液が使用される。一方、発酵工業における測定で使用されるポーラログラフ式溶存酸素電極は、120℃以上での蒸気滅菌が可能なように、電極本体の材質としてステンレス鋼が使用される。そのため、Cl−イオンによって電極本体のステンレス鋼に腐食(孔食)が生じる。
(b)上記腐食を防ぐため、電解液として前述したpH13以上のアルカリ性溶液を使用する場合は、人体に危険が生じる。
(c)上記腐食を防ぐため、電極本体の内面にフッ素樹脂等の耐熱性樹脂を被覆する場合は、コストが増大する。
12 ボディ
14 外筒
16 袋ナット
18 カソード
20 アノード
22 極支持管
24 隔膜
26 電解液
Claims (3)
- 0.05〜1mol/Lの塩化カリウムと、腐食抑制剤としてクエン酸ナトリウム、クエン酸カリウムまたは安息香酸ナトリウムとを含有することを特徴とするポーラログラフ式隔膜型電極用電解液。
- 腐食抑制剤の濃度が0.05〜0.5mol/Lであることを特徴とする請求項1に記載のポーラログラフ式隔膜型電極用電解液。
- 電解液と接液する部分がステンレス鋼からなり、電解液として請求項1または2に記載の電解液を用いたことを特徴とするポーラログラフ式隔膜型電極。
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JP2007326331A JP5145916B2 (ja) | 2007-12-18 | 2007-12-18 | ポーラログラフ式隔膜型電極用電解液およびポーラログラフ式隔膜型電極 |
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JP2007326331A JP5145916B2 (ja) | 2007-12-18 | 2007-12-18 | ポーラログラフ式隔膜型電極用電解液およびポーラログラフ式隔膜型電極 |
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JP2009150657A JP2009150657A (ja) | 2009-07-09 |
JP5145916B2 true JP5145916B2 (ja) | 2013-02-20 |
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JP5189934B2 (ja) * | 2008-09-02 | 2013-04-24 | 株式会社堀場製作所 | 溶存酸素センサ |
JP6537491B2 (ja) * | 2016-12-28 | 2019-07-03 | マクセル株式会社 | 電気化学式酸素センサ |
CN110865106A (zh) * | 2019-12-25 | 2020-03-06 | 广州商辉仪业智能科技股份有限公司 | 一种溶氧电极适配器 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6123959A (ja) * | 1984-07-13 | 1986-02-01 | Hitachi Ltd | 高温・高圧水用照合電極 |
JPH0827250B2 (ja) * | 1988-06-07 | 1996-03-21 | 新王子製紙株式会社 | 参照電極及び参照電極を用いた計測装置 |
JPH0384339U (ja) * | 1989-12-19 | 1991-08-27 | ||
JP2681230B2 (ja) * | 1990-12-28 | 1997-11-26 | 三浦工業 株式会社 | ボイラの腐食防止剤及び腐食防止方法 |
JPH05340914A (ja) * | 1992-06-08 | 1993-12-24 | Fuji Electric Co Ltd | 参照電極 |
JP4671565B2 (ja) * | 2001-09-05 | 2011-04-20 | 東亜ディーケーケー株式会社 | 隔膜型電極 |
JP2003147556A (ja) * | 2001-11-02 | 2003-05-21 | Miura Co Ltd | 非不動態化金属体の腐食抑制方法およびボイラの腐食抑制方法 |
JP4144025B2 (ja) * | 2002-06-17 | 2008-09-03 | 栗田工業株式会社 | 微小pH電極 |
JP4089360B2 (ja) * | 2002-09-09 | 2008-05-28 | 栗田工業株式会社 | 防食剤の評価方法 |
JP4217077B2 (ja) * | 2003-01-23 | 2009-01-28 | 東亜ディーケーケー株式会社 | 隔膜型電極の安定化方法 |
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