JPS6124933Y2 - - Google Patents
Info
- Publication number
- JPS6124933Y2 JPS6124933Y2 JP1978067523U JP6752378U JPS6124933Y2 JP S6124933 Y2 JPS6124933 Y2 JP S6124933Y2 JP 1978067523 U JP1978067523 U JP 1978067523U JP 6752378 U JP6752378 U JP 6752378U JP S6124933 Y2 JPS6124933 Y2 JP S6124933Y2
- Authority
- JP
- Japan
- Prior art keywords
- tank
- water
- weighing
- dilution water
- measurement
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 53
- 238000005303 weighing Methods 0.000 claims description 36
- 238000005259 measurement Methods 0.000 claims description 24
- 239000012895 dilution Substances 0.000 claims description 23
- 238000010790 dilution Methods 0.000 claims description 23
- 238000012360 testing method Methods 0.000 claims description 21
- 239000003153 chemical reaction reagent Substances 0.000 claims description 16
- 238000007865 diluting Methods 0.000 claims description 3
- 239000000243 solution Substances 0.000 claims 2
- 238000004458 analytical method Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012286 potassium permanganate Substances 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 229910021607 Silver chloride Inorganic materials 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000036284 oxygen consumption Effects 0.000 description 1
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 description 1
- YPNVIBVEFVRZPJ-UHFFFAOYSA-L silver sulfate Chemical compound [Ag+].[Ag+].[O-]S([O-])(=O)=O YPNVIBVEFVRZPJ-UHFFFAOYSA-L 0.000 description 1
- 229910000367 silver sulfate Inorganic materials 0.000 description 1
- ZNCPFRVNHGOPAG-UHFFFAOYSA-L sodium oxalate Chemical compound [Na+].[Na+].[O-]C(=O)C([O-])=O ZNCPFRVNHGOPAG-UHFFFAOYSA-L 0.000 description 1
- 229940039790 sodium oxalate Drugs 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Sampling And Sample Adjustment (AREA)
Description
【考案の詳細な説明】
本考案は検水に硫酸銀を注入して塩素イオンを
塩化銀として除き、次に過マンガン酸カリウムと
硫酸を注入し、沸騰水溶液中にて約30分間加熱す
ると共に然る後、修酸ナトリウムを加え、過マン
ガン酸カリウムにて逆滴定する所謂COD（化学
的酸素消費量）自動測定装置に関し、特にCOD
値の測定範囲を簡単な構成で而も容易に変更でき
るようにしたものである。[Detailed explanation of the invention] This invention involves injecting silver sulfate into the sample water to remove chloride ions as silver chloride, then injecting potassium permanganate and sulfuric acid, heating it in a boiling aqueous solution for about 30 minutes, and After that, we developed a so-called automatic COD (chemical oxygen consumption) measuring device that added sodium oxalate and back-titrated with potassium permanganate.
The value measurement range has a simple configuration and can be easily changed.
COD分析法に関しては例えばJIS−Ｋ−0102等
に定められている。この分析法によれば試薬の酸
化力の関係により検水の量が100mlの場合は
10ppm（COD値）まで測定可能となつている。
したがつてそれ以上のCOD値を測定する場合は
検水量を少なく、たとえば検水量を50mlにするこ
とで20ppmまで測定可能になる。 The COD analysis method is defined in, for example, JIS-K-0102. According to this analysis method, due to the oxidizing power of the reagent, if the amount of sample water is 100ml,
It is now possible to measure up to 10ppm (COD value).
Therefore, when measuring a COD value higher than this, the amount of water to be tested is reduced, for example, by reducing the amount of water to 50 ml, it is possible to measure up to 20 ppm.
従来のCOD自動測定装置は上記COD分析法に
準拠して設計されている。特に従来装置では検水
専用の秤量槽を設け、而も該量槽によつて秤量で
きる容量が一定量、たとえば100mlに固定されて
いる。これは分析に必要な試料の量を100mlとし
た場合に一番安定した分析値を得ることができる
ことに関連している。 Conventional COD automatic measuring devices are designed in accordance with the above COD analysis method. Particularly, in conventional devices, a measuring tank is provided exclusively for water testing, and the capacity that can be measured by the measuring tank is fixed at a fixed amount, for example, 100 ml. This is related to the fact that the most stable analytical values can be obtained when the amount of sample required for analysis is 100 ml.
然しながら、上記従来のように検水専用の秤量
槽を設け、更に該槽によつて秤量できる容量を
100mlに固定した場合COD値は上述の如く０〜
10ppmの範囲内でしか測定できないという欠点
がある。したがつて従来はこの欠点を解消するた
めに容量の異なる秤量槽を複数個備え、必要に応
じて該秤量槽を取り替え使用することによつて
COD値の測定範囲を変更できるようにしてい
る。 However, as in the conventional method described above, a weighing tank exclusively for water testing is provided, and the capacity that can be weighed by the tank is increased.
When fixed at 100ml, the COD value is 0~ as mentioned above.
The drawback is that it can only be measured within a range of 10 ppm. Therefore, conventional methods have been used to overcome this drawback by providing a plurality of weighing tanks with different capacities and replacing the weighing tanks as necessary.
The COD value measurement range can be changed.
然るに上記したようにCOD分析法においては
一般に試料の量を100mlとしているので、従来の
装置ではたとえば50mlの検水用秤量槽に対しては
50mlの希釈水用秤量槽を、又20mlの検水用秤量槽
に対しては80mlの希釈水用秤量槽をというように
幾通りもの検水並びに希釈水専用の秤量槽を備え
なければならない。この為配管、制御等が複雑に
なるばかりでなく、装置本体も大型になり安価に
製造できないという欠点があつた。 However, as mentioned above, in the COD analysis method, the sample volume is generally 100ml, so conventional equipment cannot handle, for example, a 50ml weighing tank.
It is necessary to have a 50 ml weighing tank for dilution water, and for a 20 ml test water weighing tank, an 80 ml weighing tank for dilution water, and so on. This not only complicates piping, control, etc., but also increases the size of the device itself, which has the drawback of not being able to be manufactured at low cost.
本考案は上記従来の欠点に鑑み、１個の秤量槽
で検水用と希釈水用とを兼ね、該秤量槽による秤
量回数により所望の検水量或いは希釈水量を得る
ように構成したCOD自動測定装置を提供するも
のである。 In view of the above-mentioned conventional drawbacks, the present invention is an automatic COD measurement system in which a single weighing tank is used for both test water and dilution water, and a desired amount of test water or dilution water is obtained by the number of times the weighing tank is weighed. It provides equipment.
以下本考案を図に基づいて詳細に説明する。図
は本考案によるCOD自動測定装置のフローシー
ト図を示す。図において、検水はピンチバルブ１
の開成により検水供給管２を介して秤量槽３に導
入される。一方検水を希釈する希釈水はピンチバ
ルブ４の開成により希釈水槽５から希釈水供給管
６を介して秤量槽３に導入される。今、秤量槽３
にて秤量できる容量は20mlに設定されており、そ
れ以上導入されると余剰分はオーバフロー管７を
介して外部へ排水される。一方秤量槽３に導入さ
れた検水或いは希釈水はピンチバルブ８の開成に
より導管９を介して測定槽１０に導入され、更に
該測定槽１０には所定の試薬の導入によつて検水
のCOD値が測定される。なお、１１〜１４は
COD分析に必要な各試薬を貯液する貯液槽を示
し、貯液槽１１，１２の試薬はポンプP1，P2にて
それぞれ試薬秤量槽１５，１６に送られ秤量され
たのち補助秤量槽１７を介して測定槽１０に送ら
れる。補助秤量槽１７には必要に応じてピンチバ
ルブの開成により希釈水槽５から、希釈水が供給
される。一方貯液槽１３，１４の試薬はポンプ
P3，P4にて直接測定槽１０に送られる。 The present invention will be explained in detail below based on the drawings. The figure shows a flow sheet diagram of the automatic COD measuring device according to the present invention. In the figure, the water test is performed using pinch valve 1.
When the test water is opened, the sample water is introduced into the weighing tank 3 via the test water supply pipe 2. On the other hand, dilution water for diluting the test water is introduced from the dilution water tank 5 into the weighing tank 3 via the dilution water supply pipe 6 by opening the pinch valve 4 . Now, weighing tank 3
The capacity that can be weighed is set to 20 ml, and if more is introduced, the excess will be drained to the outside via the overflow pipe 7. On the other hand, the test water or dilution water introduced into the weighing tank 3 is introduced into the measurement tank 10 via the conduit 9 by opening the pinch valve 8, and further into the measurement tank 10 by introducing a predetermined reagent. COD value is measured. In addition, 11 to 14 are
It shows a liquid storage tank that stores each reagent required for COD analysis.The reagents in liquid storage tanks 11 and 12 are sent to reagent weighing tanks 15 and 16 by pumps P 1 and P 2 , respectively, and weighed. It is sent to the measurement tank 10 via the tank 17. Dilution water is supplied to the auxiliary weighing tank 17 from the dilution water tank 5 by opening a pinch valve as needed. On the other hand, the reagents in the liquid storage tanks 13 and 14 are pumped
It is sent directly to the measurement tank 10 at P 3 and P 4 .
以上の構成において、今秤量槽３の１回の秤量
操作によつて得られる容量は20mlなので、該秤量
槽３にて検水の秤量操作を５回行ない測定槽１０
に順次導入すれば検水量は計100mlとなるから
COD測定範囲は０〜10ppmとなる。また、まず
秤量槽３にて検水の秤量操作を２回（40ml）行
い、次に該秤量槽３にて希釈水の秤量操作を３回
（60ml）行ない検水、希釈水共に測定槽１０に導
入すればCOD測定範囲は０〜25ppmとなる。更
に検水秤量操作を１回（20ml）希釈水秤量操作を
４回（80ml）行ないそれぞれ測定槽１０に導入す
ればCOD測定範囲は０〜50ppmとなる。 In the above configuration, the capacity obtained by one weighing operation of the weighing tank 3 is 20 ml, so the weighing operation of the test water is performed five times in the weighing tank 3, and the measuring tank 10
If you introduce them one after another, the total amount of water tested will be 100ml.
The COD measurement range is 0 to 10 ppm. First, the test water was weighed twice (40ml) in the weighing tank 3, and then the dilution water was weighed three times (60ml) in the weighing tank 3, and both the test water and the dilution water were weighed in the measuring tank 10. If it is introduced into the system, the COD measurement range will be 0 to 25 ppm. Furthermore, if the test water weighing operation is carried out once (20 ml) and the dilution water weighing operation is carried out four times (80 ml) and each sample is introduced into the measurement tank 10, the COD measurement range becomes 0 to 50 ppm.
この様に１個の秤量槽３にて行なう検水並びに
希釈水の秤量操作回数を考慮することによつて極
めて容易にCODの測定範囲を変更することがで
きるわけである。 In this way, by considering the number of times of water testing and dilution water weighing operations performed in one weighing tank 3, the COD measurement range can be changed very easily.
尚、上記実施例では秤量槽３の１回の秤量操作
によつて得られる容量が20mlになつているが、20
mlに限らないのはもちろんである。また上記各ピ
ンチバルブの開閉制御は周知の制御技術により自
動的に行なわれる。 In the above embodiment, the capacity obtained by one weighing operation of the weighing tank 3 is 20 ml, but
Of course, it is not limited to ml. Furthermore, the opening and closing control of each of the pinch valves is automatically performed using well-known control techniques.
以上の様に本考案のCOD自動測定装置によれ
ば、極めて簡単な構成にてCODの測定範囲を容
易に変更することができるので配管、制御等が簡
素化し、よつて装置本体も小型になり安価に製造
し得るという大きな効果がある。さらに又本考案
によれば、COD値測定のため正確に秤量した試
薬を補助秤量槽にて希釈水とともに測定槽へ送る
ため、試薬を測定槽へ導く導管壁面に試薬を含有
する液滴が付着し残存することがなくなり、上記
の正確に秤量した試薬を全て測定槽へ導くことが
できるから、COD値を精度高く測定することが
できる。 As described above, according to the automatic COD measurement device of the present invention, the COD measurement range can be easily changed with an extremely simple configuration, which simplifies piping, control, etc., and the device itself can also be made smaller. It has the great effect of being able to be manufactured at low cost. Furthermore, according to the present invention, in order to send accurately weighed reagents for COD value measurement to the measurement tank together with dilution water in the auxiliary weighing tank, droplets containing the reagents adhere to the wall of the conduit leading the reagent to the measurement tank. Since there is no remaining residue and all of the accurately weighed reagents mentioned above can be guided to the measurement tank, the COD value can be measured with high precision.
図は本考案によるCOD自動測定装置のフロー
シート図を示す。
１，４，８はピンチバルブ、２は検水供給管、
３は秤量槽、５は希釈水槽、６は希釈水供給管、
７はオーバフロー管、９は導管、１０は測定槽。
The figure shows a flow sheet diagram of the automatic COD measuring device according to the present invention. 1, 4, 8 are pinch valves, 2 is a test water supply pipe,
3 is a weighing tank, 5 is a dilution water tank, 6 is a dilution water supply pipe,
7 is an overflow pipe, 9 is a conduit, and 10 is a measurement tank.
Claims (1)
測定槽を設けたCOD自動測定装置において、 一定の容量を秤量する秤量槽を設けると共に該
秤量槽に検水を導く検水供給管と、該検水を希釈
するための希釈水を導く希釈水供給管と、秤量し
た検水或いは希釈水を上記測定槽に導く導管とを
それぞれ開閉弁を介して接続し、上記試薬のうち
特定の試薬の溶液を秤量する試薬秤量槽と、前記
試薬秤量槽と上記測定槽の間に希釈水を導く希釈
水供給管と接続された補助秤量槽を設け、上記秤
量槽による秤量回数により所望量の検水或いは希
釈水，及び上記補助秤量槽による特定の試薬の溶
液の希釈水を上記測定槽に供給するようにしたこ
とを特徴とするCOD自動測定装置。[Scope of Claim for Utility Model Registration] In an automatic COD measurement device that is equipped with a measuring tank for introducing sample water, reagents, etc. and controlling the temperature, a measuring tank for weighing a certain volume is provided, and the sample water is placed in the weighing tank. A test water supply pipe for introducing the test water, a dilution water supply pipe for introducing dilution water for diluting the test water, and a conduit for introducing the weighed test water or dilution water to the measurement tank are connected through on-off valves, respectively, A reagent weighing tank for weighing a solution of a specific reagent among the reagents, and an auxiliary weighing tank connected to a dilution water supply pipe that leads dilution water between the reagent weighing tank and the measurement tank, 1. An automatic COD measuring device, characterized in that a desired amount of test water or dilution water, and water for diluting a solution of a specific reagent from the auxiliary weighing tank are supplied to the measurement tank depending on the number of measurements.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1978067523U JPS6124933Y2 (en) | 1978-05-18 | 1978-05-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1978067523U JPS6124933Y2 (en) | 1978-05-18 | 1978-05-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS54168898U JPS54168898U (en) | 1979-11-28 |
| JPS6124933Y2 true JPS6124933Y2 (en) | 1986-07-26 |
Family
ID=28974550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1978067523U Expired JPS6124933Y2 (en) | 1978-05-18 | 1978-05-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6124933Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS525583B2 (en) * | 1974-04-08 | 1977-02-15 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS525583U (en) * | 1975-06-27 | 1977-01-14 |
-
1978
- 1978-05-18 JP JP1978067523U patent/JPS6124933Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS525583B2 (en) * | 1974-04-08 | 1977-02-15 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS54168898U (en) | 1979-11-28 |
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