JPS61443A - Cadmium reducing catalyst for analysis of nitric acid - Google Patents
Cadmium reducing catalyst for analysis of nitric acidInfo
- Publication number
- JPS61443A JPS61443A JP12161784A JP12161784A JPS61443A JP S61443 A JPS61443 A JP S61443A JP 12161784 A JP12161784 A JP 12161784A JP 12161784 A JP12161784 A JP 12161784A JP S61443 A JPS61443 A JP S61443A
- Authority
- JP
- Japan
- Prior art keywords
- nitric acid
- cadmium
- reducing catalyst
- catalyst
- analysis
- 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.)
- Pending
Links
Landscapes
- Catalysts (AREA)
Abstract
Description
【発明の詳細な説明】
イ 技術の利用分野
本発明は、硝醇類のカドミウム５元・ジアゾ化法による
定年分析に用いるカドミウム貸元触媒に関する。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Application of the Technology The present invention relates to a cadmium leasing catalyst used in the retirement analysis of glassy liquors by the cadmium penta-diazotization method.
ロ、従来技術
野菜類に含まれる硝醇塩の分析は、硝酸イオン自体か発
色作用を持たないため、これをカドミウム貸元触媒によ
り亜硝酸イオンＮ Ｏ２に変換してから発色させる手法
か採１旧されている。B. Conventional technology In the analysis of nitric salts contained in vegetables, since nitrate ions themselves do not have a color-producing effect, a method is adopted in which nitrate ions are converted to nitrite ions NO2 using a cadmium catalyst and then colored. It is old.
ところて、このカドミウム還元剤には、硫醇カドミウム
水溶液に亜鉛杯を浸漬し７．１〜２時間毎に表面にＡ＋
ｊ ＋Ｈシたスポンジ様の金属カドミウムを掻革し、こ
れを細砕してなるカドミウム粉末が使用されているため
、４Ｍ Ｉｋ工程や細砕工程においてカドミウム粉末が
飛散して外部環境に毒性の強いカドミウムが流出する虞
れがあるはかりでなく、カドミウムの粉末を使用するた
め使用量に比較して亜硝酸イオンへの変換に時間を要し
不経済であるという問題があった。By the way, this cadmium reducing agent is used by dipping a zinc cup in a sulfur cadmium aqueous solution and applying A+ to the surface every 1 to 2 hours.
Since cadmium powder is used, which is made by scratching and pulverizing the sponge-like metal cadmium, the cadmium powder is scattered during the 4M Ik process and the pulverization process, and is highly toxic to the external environment. There was a problem in that it was not a scale that had a risk of cadmium leaking out, and that cadmium powder was used, so it took a long time to convert it into nitrite ions compared to the amount used, making it uneconomical.
ハ、 ｌＪ的
本発明はこのような問題に鑑み、還元触媒の製造時に環
境への流出の虞れか少なく、しかも亜硝酸への変換時間
が短いカドミウム貸元触媒を提供することを］」的とす
る。In view of these problems, the purpose of the present invention is to provide a cadmium catalyst that has less risk of being released into the environment during the production of a reduction catalyst, and which takes a short time to convert into nitrous acid. shall be.
二０発明の構成
すなわち、本発明の特徴とするところは、カドミウムを
金１＋１ ｐ！＞末の表面にコーティングした点にある
。20 Structure of the invention, that is, the feature of the present invention is that cadmium is mixed with gold 1 + 1 p! ＞It lies in the coating on the surface of the end.
ホ、実施例
そこで、以ト″に本発明の詳細を図示した実施例にブ、
（ついて説明する。E. EXAMPLES Hereinafter, examples illustrating the details of the present invention will be described.
(explain about.
予しめ微粉化した亜鉛や鉄の粉末１を硫酪力Ｆミウム溶
液に４を人し、所定時間の経過後に取出すと、金属粉末
の表面にカドミウム２が薄膜状にコーティングされたカ
ドミウム還元触媒を得ることができた（第１図）。When pre-pulverized zinc or iron powder 1 is added to a sulfuric acid solution and taken out after a predetermined period of time, a cadmium reduction catalyst with a thin film of cadmium 2 coated on the surface of the metal powder is formed. (Figure 1).
［実施例コ
−ｍｒ鉛粉末１０ｇと濃度ｌＯ％の硫酸力Ｆミウム溶液
１００ｍＭをフラスコに収容して攪拌しなから８時間放
貿した後、濾過して１に留水により洗浄、乾燥してカド
ミウム還元触媒を得ることができた。[Example: 10g of lead powder and 100mM of mium sulfate solution with a concentration of 1O% were placed in a flask and allowed to stand for 8 hours without stirring, then filtered, washed with distilled water, and dried. A cadmium reduction catalyst could be obtained.
このようにして形成したカドミウム還元剤５００ｍｇを
、イ農度９５ｐｐｍの蛸酪溶液１ｍ見に添加して攪拌し
、２０分経過後に濾過を行なうと、サンプル中の硝酸か
亜硝酸に変換される。このように処理したサンプルにス
ルファミンＭを添加して葎硝酸を窒素に分−解した後、
クロマＩ・グラフにより分析したところ、第２図に示し
たように４ 高いピークＰ３を出力し、高い感１
負により検出することができた。なお、ピークＰＩ は
、ブランク、ピークＰ２は、１００ ｐｐｍの亜硝酸イ
オンをなお、」、述した実施例においては、ヘースとな
る金属粉末に亜鉛を使用したが、鉄粉を使用しても同様
な作用を得ることができる。When 500 mg of the cadmium reducing agent thus formed is added to 1 m of octopus milk solution with a concentration of 95 ppm, stirred, and filtered after 20 minutes, nitric acid or nitrous acid in the sample is converted. After adding sulfamine M to the sample treated in this way to decompose the nitric acid into nitrogen,
When analyzed using Chroma I graph, as shown in Figure 2, 4 high peak P3 was output, and high feeling 1
It was possible to detect the negative value. In addition, peak PI is blank, and peak P2 is 100 ppm of nitrite ion.In the above-mentioned example, zinc was used as the metal powder to form the haze, but the same result can be obtained even if iron powder is used. It is possible to obtain effective effects.
へ、効果
以１、説明したように本発明によれば、金属粉末の表面
にカドミウムをコーティングしたので、カドミウムの使
用量を可及的に少なくできるばかりでなく、試料溶液に
接触するカドミウムの表面積を大きくすることができ、
亜硝酸イオンへの変換時間を大幅に短縮することができ
る。Effects 1. As explained above, according to the present invention, since the surface of the metal powder is coated with cadmium, not only the amount of cadmium used can be reduced as much as possible, but also the surface area of cadmium that comes into contact with the sample solution can be reduced. can be made larger,
The conversion time to nitrite ions can be significantly shortened.
ｉ７’５１図は本発明に係るカドミウム還元触媒の構成
を示す断面図、第２図は同」−カドミウム環元触媒によ
る硝酸の分析結果を示す波形図である。
■・・・・ｌｉ船粉末粒子Figure i7'51 is a cross-sectional view showing the structure of the cadmium reduction catalyst according to the present invention, and Figure 2 is a waveform diagram showing the analysis results of nitric acid using the same cadmium ring base catalyst. ■・・・Li ship powder particles
Claims (1)
ーティングしてなる硝酸分析用カドミウム還元触媒。A cadmium reduction catalyst for nitric acid analysis, which is made by coating the surface of zinc or iron powder particles with cadmium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12161784A JPS61443A (en) | 1984-06-13 | 1984-06-13 | Cadmium reducing catalyst for analysis of nitric acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12161784A JPS61443A (en) | 1984-06-13 | 1984-06-13 | Cadmium reducing catalyst for analysis of nitric acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61443A true JPS61443A (en) | 1986-01-06 |
Family
ID=14815685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12161784A Pending JPS61443A (en) | 1984-06-13 | 1984-06-13 | Cadmium reducing catalyst for analysis of nitric acid |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61443A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0274375U (en) * | 1988-11-22 | 1990-06-06 | ||
| KR100485251B1 (en) * | 1997-08-11 | 2005-08-04 | 니폰 덴산 시바우라 가부시키가이샤 | Condenser moter |
| US7868509B2 (en) | 2005-02-22 | 2011-01-11 | Mitsubishi Electric Corporation | Single-phase motor and hermetic compressor |
-
1984
- 1984-06-13 JP JP12161784A patent/JPS61443A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0274375U (en) * | 1988-11-22 | 1990-06-06 | ||
| JPH0343256Y2 (en) * | 1988-11-22 | 1991-09-10 | ||
| KR100485251B1 (en) * | 1997-08-11 | 2005-08-04 | 니폰 덴산 시바우라 가부시키가이샤 | Condenser moter |
| US7868509B2 (en) | 2005-02-22 | 2011-01-11 | Mitsubishi Electric Corporation | Single-phase motor and hermetic compressor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS5217085A (en) | Method of quantitative determination of free fatty acids in serum usin g fatty acid activating enzymes | |
| JPS61443A (en) | Cadmium reducing catalyst for analysis of nitric acid | |
| JPS5554561A (en) | Metal plating method for powdered body by substitution method | |
| ATE64585T1 (en) | FERRITE-CERAMIC COMPOSITE POWDER AND PROCESS FOR ITS PRODUCTION. | |
| Kurata | On the appearance of hydrogenase, nitrate reductase and aspartase during the ontogeny of the frog | |
| JPS5512437A (en) | Enzyme electrode | |
| SU668878A1 (en) | Method of obtaining titanyl and ammonia sulfate from iron-containing sulfide solutions | |
| Dong et al. | The application of an ultramicroelectrode in homogeneous catalytic reaction—Part I. General characteristic of a homogeneous catalytic reaction at an ultramicroelectrode with arbitrary geometry under steady state | |
| DE2961445D1 (en) | Delta 5,3-cetosteroid isomerase and its use in immuno-enzyme quantifications | |
| Shwaery et al. | Determination of phospholipid oxidation in cultured cells | |
| Seryanov et al. | Anodic Dissolution of Iron--Cobalt Alloy 49 KF 2 VI in Acid Phosphates | |
| SU1264038A1 (en) | Method for identifying uranium (iv) | |
| Lai et al. | Polarography of uranyl-nitrilotriacetate complex | |
| Motojima | Spectrophotometric Determination of Micro Quantities of Titanium with 8-Hydroxyquinaldine | |
| JPS54134748A (en) | Acceleration of setting inorganic coating | |
| JPS5551055A (en) | Purification of aqueous solution of ammonium thioglycolate | |
| Ismail et al. | Effect of Charged and Uncharged Surfactants on Polarographic Waves of Uranium (VI) in Perchloric Acid Solutions | |
| Shmelov | Reasons for Retardation of the Cathodic Reduction Process of Chromic Anhydride in Sulphuric Acid Solutions on Certain Metals | |
| JPS5231036A (en) | Process for reduction of ferric-edta complex | |
| TsAI et al. | Determination of trace elements in hair specimens of workers in paint factory | |
| JPS57139155A (en) | Rust-inhibiting paint | |
| JPS6410239A (en) | Method for forming positive type resist pattern | |
| Liu et al. | Spectrophotometric Determination of Trace Zinc With Thiocyanate and Victoria Blue 4 R | |
| JPS5539655A (en) | Treating method of magnetic powder | |
| SU1261977A1 (en) | Electrolyte for pickling aluminium |