JPH0152697B2 - - Google Patents
Info
- Publication number
- JPH0152697B2 JPH0152697B2 JP8739181A JP8739181A JPH0152697B2 JP H0152697 B2 JPH0152697 B2 JP H0152697B2 JP 8739181 A JP8739181 A JP 8739181A JP 8739181 A JP8739181 A JP 8739181A JP H0152697 B2 JPH0152697 B2 JP H0152697B2
- Authority
- JP
- Japan
- Prior art keywords
- gas
- ions
- nitrate
- reagent
- nitrogen
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims description 54
- 239000007789 gas Substances 0.000 claims description 49
- 239000007788 liquid Substances 0.000 claims description 27
- 238000005192 partition Methods 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 10
- 229910002651 NO3 Inorganic materials 0.000 claims description 9
- 239000003153 chemical reaction reagent Substances 0.000 claims description 9
- -1 nitrite ions Chemical class 0.000 claims description 9
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 claims description 6
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 claims description 6
- 238000004458 analytical method Methods 0.000 claims description 5
- 230000002209 hydrophobic effect Effects 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 4
- 150000002500 ions Chemical class 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- IMBKASBLAKCLEM-UHFFFAOYSA-L ferrous ammonium sulfate (anhydrous) Chemical compound [NH4+].[NH4+].[Fe+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O IMBKASBLAKCLEM-UHFFFAOYSA-L 0.000 claims description 3
- APUPEJJSWDHEBO-UHFFFAOYSA-P ammonium molybdate Chemical compound [NH4+].[NH4+].[O-][Mo]([O-])(=O)=O APUPEJJSWDHEBO-UHFFFAOYSA-P 0.000 claims description 2
- 229940010552 ammonium molybdate Drugs 0.000 claims description 2
- 235000018660 ammonium molybdate Nutrition 0.000 claims description 2
- 239000011609 ammonium molybdate Substances 0.000 claims description 2
- 239000011347 resin Substances 0.000 claims description 2
- 229920005989 resin Polymers 0.000 claims description 2
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 claims description 2
- 238000000926 separation method Methods 0.000 description 19
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 10
- 238000001514 detection method Methods 0.000 description 6
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 description 5
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000007791 liquid phase Substances 0.000 description 3
- JVMRPSJZNHXORP-UHFFFAOYSA-N ON=O.ON=O.ON=O.N Chemical compound ON=O.ON=O.ON=O.N JVMRPSJZNHXORP-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Molecular Biology (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Description
【発明の詳細な説明】
本発明は、亜硝酸態および硝酸態窒素の分析方
法に関し、もつと詳しくは前記各状態窒素を一酸
化窒素ガスに還元し、その一酸化窒素ガスを定量
することによつて前記各状態窒素の濃度を測定す
るようにした亜硝酸態および硝酸態窒素の分析方
法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for analyzing nitrogen in the nitrite and nitrate states, and more particularly, the present invention relates to a method for analyzing nitrogen in the nitrite state and nitrate state, and more specifically, to reduce nitrogen in each of the above states to nitrogen monoxide gas and quantify the nitrogen monoxide gas. Therefore, the present invention relates to a method for analyzing nitrogen in the nitrite and nitrate states, which measures the concentration of nitrogen in each of the above states.
従来からのこのような分析方法においては、亜
硝酸態窒素としての亜硝酸イオンおよび硝酸態窒
素としての硝酸イオンを含む検水に、前記各イオ
ンを一酸化窒素ガスに還元するための試薬を混合
し、その混合液を爆気することによつてその混合
液から一酸化窒素ガスを分離するようにしてい
る。しかしこのような分析方法においては、分離
するための前記爆気操作は、各検水ごとに回分操
作しなければならず、またその回分操作とともに
分離された一酸化窒素ガスを捕集するための操作
を必要とし、操作が面倒になる。また爆気操作に
おいて分離された一酸化窒素ガス中には水滴が含
まれるので、その水滴を除去するためのトラツプ
などを必要とする。したがつて、このような分析
方法に従つて分析装置を構成しようとする場合に
は装置が複雑になる。 In this conventional analysis method, a reagent for reducing each ion to nitric oxide gas is mixed with sample water containing nitrite ions as nitrite nitrogen and nitrate ions as nitrate nitrogen. Then, nitrogen monoxide gas is separated from the mixed liquid by atomizing the mixed liquid. However, in such an analysis method, the above-mentioned explosion operation for separation must be performed in batches for each water sample, and in addition to the batch operation, there is also a process for collecting the separated nitric oxide gas. It requires operation and becomes cumbersome. Furthermore, since the nitrogen monoxide gas separated during the explosion operation contains water droplets, a trap or the like is required to remove the water droplets. Therefore, when an analyzer is constructed according to such an analysis method, the apparatus becomes complicated.
本発明の目的は、上述の技術的課題を解決し
て、操作が容易であつて連続的な分析処理が可能
であり、しかも装置構成を簡単にすることができ
る亜硝酸態および硝酸態窒素の分析方法を提供す
ることである。 The purpose of the present invention is to solve the above-mentioned technical problems and to provide a method for detecting nitrite and nitrate nitrogen that is easy to operate, allows continuous analytical processing, and has a simple device configuration. The objective is to provide an analytical method.
以下図面によつて本発明の実施例を説明する。
第１図は本発明に従つて構成される分析装置の一
実施例の系統図である。この分析装置は、検水に
試薬を混合するための混合部１と、混合部１から
の混合液から生じた一酸化窒素ガスをその混合液
から分離するための気液分離手段２と、気液分離
手段２にゼロガスを供給して前記分離された一酸
化窒素ガスをゼロガスとともに取り出すためのゼ
ロガス供給手段３と、気液分離手段２から取り出
された一酸化窒素ガスを定量するための検出手段
４とを含む。 Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a system diagram of an embodiment of an analyzer constructed according to the present invention. This analyzer includes a mixing section 1 for mixing a reagent with sample water, a gas-liquid separation means 2 for separating nitrogen monoxide gas generated from the mixed solution from the mixing section 1, and a gas-liquid separation means 2 for separating the nitric oxide gas generated from the mixed solution from the mixing section 1. Zero gas supply means 3 for supplying zero gas to the liquid separation means 2 and taking out the separated nitrogen monoxide gas together with the zero gas, and detection means for quantifying the nitrogen monoxide gas taken out from the gas-liquid separation means 2. 4.
混合部１は、一定の定量ポンプＰ１，Ｐ２およ
び混合器１０を備える。各定量ポンプＰ１，Ｐ２
は管路１１を介して混合器１０に接続される。こ
の混合器１０は、管路１２を介して気液分離手段
２に接続される。 The mixing section 1 comprises certain metering pumps P1, P2 and a mixer 10. Each metering pump P1, P2
is connected to the mixer 10 via a line 11. This mixer 10 is connected to the gas-liquid separation means 2 via a conduit 12.
第２図を併わせて参照して、気液分離手段２
は、円筒状の隔壁１３と、隔壁１３の軸線まわり
に隔壁１３と間隔をあけて囲繞した円筒状の本体
１４とから構成される。隔壁１３の遊端部は、本
体１４の側壁を気密的に貫通されて本体１４の外
側方に導出される。隔壁１３は、通気性多孔質の
疎水性材料から形成される。この疎水性材料は、
たとえば四フツ化エチレン樹脂が選ばれる。この
ようにして構成される気液分離手段２には、隔壁
１３を介して隣接された一対の流路１５，１６が
形成される。これらの流路１５，１６のうち、一
方の流路１５には前述の混合器１０からの管路１
２が接続される。他方の流路１６は、管路１７を
介してゼロガス供給手段３に接続される。 Referring also to FIG. 2, gas-liquid separation means 2
is composed of a cylindrical partition wall 13 and a cylindrical main body 14 surrounding the partition wall 13 at a distance from the partition wall 13 around the axis of the partition wall 13 . The free end of the partition wall 13 passes through the side wall of the main body 14 in an airtight manner and is led out to the outside of the main body 14. The partition wall 13 is formed from an air-permeable porous hydrophobic material. This hydrophobic material is
For example, tetrafluoroethylene resin is selected. In the gas-liquid separation means 2 constructed in this way, a pair of channels 15 and 16 are formed adjacent to each other with a partition wall 13 interposed therebetween. Among these channels 15 and 16, one channel 15 is connected to the pipe 1 from the mixer 10 described above.
2 is connected. The other flow path 16 is connected to the zero gas supply means 3 via a conduit 17.
ゼロガス供給手段３において、ポンプＰ３から
吸入された空気は、流量制御弁１８を介して一定
量に制御されてオゾン発生器１９に与えられる。
オゾン発生器１９においては、空気中の酸素から
オゾンが生成されるとともに、空気中に含まれる
一酸化窒素ガスがそのオゾンによつてオゾン酸化
されて二酸化窒素ガスに転化される。オゾン発生
器１９からのオゾンと、二酸化窒素ガスとを含む
空気はスクラバ２０によつて水洗洗浄される。こ
れによつてオゾン発生器１９からの空気は、オゾ
ンと二酸化窒素ガスとが除去され、ゼロガスとし
て調製されてフイルタ２１与えられる。フイルタ
２１においては、スクラバ２０からのゼロガス中
に含まれる水滴が除去される。このようにしてゼ
ロガス供給手段３によつて調製されたゼロガス
は、管路１７を介して気液分離手段２の流路１６
に供給される。なお管路１７には、後述するよう
に流路１６内を負圧に保つために、余剰のゼロガ
スを排気するためのオーバフロー管１７ａが接続
される。 In the zero gas supply means 3, the air sucked from the pump P3 is controlled to a constant amount via the flow rate control valve 18 and is supplied to the ozone generator 19.
In the ozone generator 19, ozone is generated from oxygen in the air, and nitrogen monoxide gas contained in the air is oxidized by the ozone and converted into nitrogen dioxide gas. Air containing ozone and nitrogen dioxide gas from the ozone generator 19 is washed with water by a scrubber 20 . As a result, ozone and nitrogen dioxide gas are removed from the air from the ozone generator 19, and the air is prepared as zero gas and supplied to the filter 21. In the filter 21, water droplets contained in the zero gas from the scrubber 20 are removed. The zero gas thus prepared by the zero gas supply means 3 is delivered to the flow path 16 of the gas-liquid separation means 2 via the pipe line 17.
supplied to Note that an overflow pipe 17a for exhausting excess zero gas is connected to the pipe line 17 in order to maintain the inside of the flow passage 16 at a negative pressure as described later.
気液分離手段２における流路１５の出口側に
は、管路２２を介して排出器２３が接続される。
この排出器２３は大気圧平衡管２４を備え、これ
によつて流路１５内は常に大気圧と同程度の圧力
が維持される。排出器２３には排出管２５が接続
される。 A discharger 23 is connected to the outlet side of the flow path 15 in the gas-liquid separation means 2 via a pipe line 22 .
This ejector 23 is equipped with an atmospheric pressure balancing tube 24, whereby a pressure comparable to atmospheric pressure is always maintained within the flow path 15. A discharge pipe 25 is connected to the discharge device 23 .
気液分離手段２における流路１６の出口側に
は、管路２６を介して検出手段４が接続される。
この検出手段４は、いわゆる化学発光式NOx計
と呼ばれるものであつて、第３式に示されるよう
に、一酸化窒素NOが過剰のオゾンO3で酸化され
るときに、600nm〜3000nm付近の赤外光を発す
ることを原理として構成される。 The detection means 4 is connected to the outlet side of the flow path 16 in the gas-liquid separation means 2 via a pipe line 26 .
This detection means 4 is a so-called chemiluminescent NO x meter, and as shown in the third equation, when nitrogen monoxide NO is oxidized by excess ozone O It is constructed on the principle of emitting infrared light.
NO＋O3→NO2＋hν …(1)
すなわち、検出手段４において、管路２６を介
して導入された一酸化窒素ガスを含むガスは、キ
ヤピラリ３０を介して圧縮されて発光セル３１内
に導入される。この発光セル３１には、またオゾ
ン発生器３２を介してオゾンが与えられ、これに
よつて前記第１式に示される反応が発光セル３１
内で行なわれる。この反応に併なつて発せられた
赤外光は、発光セル３１に関連して設けられた検
出器３３によつて検知され、これによつて一酸化
窒素ガスの濃度が定量される。発光セル３１内に
おいて反応生成された二酸化窒素ガスを含む排ガ
スはスクラバ３４によつて水洗洗浄され、これに
よつて二酸化窒素スが除去されてポンプＰ４を介
して排気管３５から排気される。なおポンプＰ４
の排気駆動によつて気液分離手段２における流路
１６内は常に負圧の状態が維持される。 NO+O 3 →NO 2 +hν (1) That is, in the detection means 4, the gas containing nitrogen monoxide gas introduced through the pipe line 26 is compressed through the capillary 30 and introduced into the light emitting cell 31. Ru. This light-emitting cell 31 is also supplied with ozone via an ozone generator 32, whereby the reaction represented by the first equation occurs in the light-emitting cell 31.
It is done inside. The infrared light emitted along with this reaction is detected by a detector 33 provided in association with the light emitting cell 31, and the concentration of nitrogen monoxide gas is determined thereby. Exhaust gas containing nitrogen dioxide gas generated by reaction in the light emitting cell 31 is washed with water by a scrubber 34, thereby removing nitrogen dioxide gas, and is exhausted from an exhaust pipe 35 via a pump P4. In addition, pump P4
Due to the exhaust drive, a negative pressure state is always maintained in the flow path 16 of the gas-liquid separation means 2.
以上のように構成される分析装置を用いて、亜
硝酸態および硝酸態窒素を分析する方法を説明す
る。定量ポンプＰ１および管路１１を介して混合
器１０内には、単位時間当り一定量の検水が流入
される。また混合器１０内には、検水中に含まれ
る亜硝酸イオンNO2 -および硝酸イオンNO3 -を
一酸化窒素ガスに還元するための単位時間当り一
定量の試薬が定量ポンプＰ２を介して流入され
る。この還元試薬は、たとえば12規定濃度の硫酸
と、２重量％の硫酸第１鉄アンモニウムと、0.5
重量％のモリブデン酸アンモニウムとを含む。こ
れによつて混合器１０内では第２式および第３式
で示される還元反応が生じ、検水中に含まれる亜
硝酸イオンNO2 -および硝酸イオンNO3 -は一酸
化窒素ガスNOに還元される。 A method for analyzing nitrite nitrogen and nitrate nitrogen using the analyzer configured as described above will be described. A fixed amount of test water flows into the mixer 10 via the metering pump P1 and the pipe line 11 per unit time. Furthermore, a fixed amount of reagent flows into the mixer 10 via a metering pump P2 for reducing nitrite ions NO 2 - and nitrate ions NO 3 - contained in the sample water into nitrogen monoxide gas. be done. The reducing reagent may be, for example, 12N sulfuric acid, 2% by weight ferrous ammonium sulfate, and 0.5% ferrous ammonium sulfate.
% ammonium molybdate. As a result, reduction reactions shown by the second and third equations occur in the mixer 10, and the nitrite ions NO 2 - and nitrate ions NO 3 - contained in the sample water are reduced to nitrogen monoxide gas NO. Ru.
NO2 -＋2H+＋2e→NO↑＋H2O …(2)
NO3 -＋4H+＋3e→NO↑＋2H2O …(3)
このようにして還元される一酸化窒素ガスを含
む混合器１０からの混合液は、管路１２を介して
気液分離手段２における流路１５に単位時間当り
一定の量が流路される。このとき気液分離手段２
においては、隔壁１３を介して流路１５から流路
１６に向けて混合液中の一酸化窒素ガスのみが透
過される。もつと詳しは、隔壁１３は通気性多孔
質の材料から形成され、しかも流路１６は負圧状
態であるので、その孔を介して一酸化窒素ガスが
透過する。また隔壁１３は疎水性材料から形成さ
れるので、混合液中の液相部分が隔壁１３を介し
て流路１６側に滲透することが防がれる。このよ
うにして気液分離手段２においては、混合器１０
からの混合液が気相と液相とに分離されて、流路
１６に一酸化窒素ガスのみが取り出される。この
一酸化窒素ガスは前述のようにゼロガス供給手段
３からのゼロガスとともに検出手段４に導入され
て定量される。気液分離手段２における流路１５
において、一酸化窒素ガスが分離された後の混合
液の排液は、管路２２、排出器２３および排出管
２５を介して排出される。 NO 2 - +2H + +2e→NO↑+H 2 O...(2) NO 3 - +4H + +3e→NO↑+2H 2 O...(3) From the mixer 10 containing the nitrogen monoxide gas reduced in this way A constant amount of the mixed liquid is passed through the pipe line 12 into the flow path 15 in the gas-liquid separation means 2 per unit time. At this time, the gas-liquid separation means 2
In this case, only the nitrogen monoxide gas in the mixed liquid is permeated from the flow path 15 to the flow path 16 via the partition wall 13. More specifically, the partition wall 13 is made of a porous material that is breathable, and since the flow path 16 is under a negative pressure state, nitrogen monoxide gas permeates through the hole. Further, since the partition wall 13 is formed from a hydrophobic material, the liquid phase portion of the liquid mixture is prevented from permeating through the partition wall 13 to the channel 16 side. In this way, in the gas-liquid separation means 2, the mixer 10
The mixed liquid is separated into a gas phase and a liquid phase, and only nitrogen monoxide gas is taken out into the flow path 16. As described above, this nitrogen monoxide gas is introduced into the detection means 4 together with the zero gas from the zero gas supply means 3 and is quantified. Channel 15 in gas-liquid separation means 2
In this case, the mixed liquid after the nitric oxide gas has been separated is discharged through the pipe line 22, the discharge device 23, and the discharge pipe 25.
以上のように本発明によれば、混合器１０から
の一酸化窒素ガスを含む検水と、試薬との混合液
が、気液分離手段における隔壁によつて連続的に
気相すなわち一酸化窒素ガスと液相とに分離さ
れ、分析処理が一連の連続操作で行なうことがで
きるので迅速な分析処理を行なうことができ、し
かも先行技術に関連して述べたような面倒な操作
を省略することができ、装置構成も簡単になる。 As described above, according to the present invention, the liquid mixture of the sample water containing nitric oxide gas from the mixer 10 and the reagent is continuously transferred into the gas phase, that is, the nitrogen monoxide gas, by the partition wall in the gas-liquid separation means. Since the gas and liquid phases are separated and the analytical process can be carried out in a series of continuous operations, the analytical process can be carried out quickly, and the troublesome operations described in connection with the prior art can be omitted. This also simplifies the device configuration.
第１図は本発明に従つて構成される分析装置の
一実施例の系統図、第２図は第１図示の気液分離
手段２の具体的な断面図である。
１…混合部、２…気液分離手段、３…ゼロガス
供給手段、４…検出手段、１３…隔壁。
FIG. 1 is a system diagram of an embodiment of an analyzer constructed according to the present invention, and FIG. 2 is a specific sectional view of the gas-liquid separation means 2 shown in FIG. DESCRIPTION OF SYMBOLS 1... Mixing part, 2... Gas-liquid separation means, 3... Zero gas supply means, 4... Detection means, 13... Partition wall.
Claims (1)
に、前記各イオンを一酸化窒素ガスに還元するた
めの試薬を混合し、通気性多孔質の疎水性材料か
ら成る隔壁を介して隣接された一対の流路のう
ち、一方の流路に前記混合液を流過させ、前記隔
壁を介して他方の流路に透過した一酸化窒素ガス
を定量することによつて前記亜硝酸イオンおよび
硝酸イオンの濃度を測定することを特徴とする亜
硝酸態および硝酸態窒素の分析方法。 ２ 前記試薬は12規定濃度の硫酸と、２重量％の
硫酸第１鉄アンモニウムと、0.5重量％のモリブ
デン酸アンモニウムとを含む溶液であることを特
徴とする特許請求の範囲第１項記載の亜硝酸態お
よび硝酸態窒素の分析方法。 ３ 前記疎水性材料は、四フツ化エチレン樹脂で
あることを特徴とする特許請求の範囲第１項記載
の亜硝酸態および硝酸態窒素の分析方法。[Scope of Claims] 1. A reagent for reducing each ion to nitric oxide gas is mixed with sample water containing nitrite ions and nitrate ions, and the mixture is mixed with a reagent for reducing each of the ions to nitric oxide gas, and the mixture is passed through a partition wall made of an air-permeable porous hydrophobic material. The mixed liquid is allowed to flow through one of a pair of adjacent channels, and the nitric oxide gas that has permeated into the other channel through the partition wall is quantified. A method for analyzing nitrite and nitrate nitrogen, characterized by measuring the concentration of ions and nitrate ions. 2. The reagent according to claim 1, wherein the reagent is a solution containing 12N concentration of sulfuric acid, 2% by weight of ferrous ammonium sulfate, and 0.5% by weight of ammonium molybdate. Analysis method for nitrate and nitrate nitrogen. 3. The method for analyzing nitrite and nitrate nitrogen according to claim 1, wherein the hydrophobic material is a tetrafluoroethylene resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8739181A JPS57201850A (en) | 1981-06-05 | 1981-06-05 | Analysing method for nitrogen in forms of nitrous acil and nitric acil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8739181A JPS57201850A (en) | 1981-06-05 | 1981-06-05 | Analysing method for nitrogen in forms of nitrous acil and nitric acil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57201850A JPS57201850A (en) | 1982-12-10 |
| JPH0152697B2 true JPH0152697B2 (en) | 1989-11-09 |
Family
ID=13913580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8739181A Granted JPS57201850A (en) | 1981-06-05 | 1981-06-05 | Analysing method for nitrogen in forms of nitrous acil and nitric acil |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57201850A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5880554A (en) * | 1981-11-09 | 1983-05-14 | Mitsubishi Chem Ind Ltd | Method for measuring ultramicro amount of nitrous acid type nitrogen |
| JPS61189459A (en) * | 1985-02-19 | 1986-08-23 | Agency Of Ind Science & Technol | Reduction evaporation and chemiluminescence type automatic micro-analyzing instrument for underwater total nitrogen |
| JP2764986B2 (en) * | 1989-01-06 | 1998-06-11 | 株式会社明電舎 | Nitrite determination device |
| KR101030931B1 (en) | 2010-10-01 | 2011-04-27 | 구성테크닉스 주식회사 | Hydrogen Chloride Meter in Flue Emission Continuous Continuous Measurement System |
| JP7084577B2 (en) * | 2018-07-23 | 2022-06-15 | ビーエルテック株式会社 | Nitrogen content quantification method, nitrogen content quantification device |
| CN117699750B (en) * | 2024-01-10 | 2025-05-27 | 山东大学 | A preparation method and generation system of gaseous nitrous acid |
-
1981
- 1981-06-05 JP JP8739181A patent/JPS57201850A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57201850A (en) | 1982-12-10 |
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