Standardakancin ƙasa don ƙudurin ƙuduri a cikin tafarnuwa mai narkewa a cikin China

Wannan daidaitaccen ya yi daidai da ƙungiyar kasa da kasa don daidaitawa (ISO) 5567-1982 "Dogara na Volatile Orginal Sulfis a cikin tafarnuwa mai narkewa".

1 Takaitaccen Hanyar Hanyar

Samfurin yana da ruwa a ruwa, ethanol, an ƙididdige mahaɗan ƙwayoyin halitta, da kuma distillate a cikin tsarin ƙwayoyin cuta na azurfa ana lissafta ta hanyar amfani da azurfa mafita.

2 reagents

2.1 nitric acid (takamaiman nauyi 1.42)
2.2 ethanol 95% (v / v)
2.3 Sall Paraffin
2.4 nitric acid 10% (v / v)
2.5 ammonium hydroxide 10% (v / v)
2.6 0.1000mol / l azurfa nitrate bayani bayani, shiri da kuma hanya ta CIGABA AN GB 601-1977 "Motoci na Sihiri na Shagest bayani" aiki.
2.7 0.1000mol / L ammonium thiocyanate daidaitaccen bayani, mai la'akari ammonium thiocyanate 8g narkar da a cikin ruwa 1l. Gwajin daidaitawa GB 601-1977 "na sinadarai reactent recoled bayani bayani na shiri bayani" a cikin hanyar sodium hanya.
2.8 ferric amonium sulfate mai nuna bayani, mafita cikakken bayani.

3 Kayan aiki

Yayin bincike, musamman ma shafi kayan distillation ɗin ya kamata a guji lamba tare da jan ƙarfe ko samfuran roba, haɗin distillatus ƙasa ne na gilashin gilashin.
3.1 Distillation Appatatus (Duba zane-zanen ne na 250ml dogo ne 250ml doguwarsa da maimaitawa da gilashi mai kamshi ko daidaitaccen gilashi tare da ƙarshen ƙasa.
3.2 250 ml ƙasa-katange consting flasks, mai iya amfani da amfani da shi dangane da maimaitawa.
3.3 zazzabi ruwa mai wanka, mai iya sarrafa zazzabi zuwa 37 ° C.
3.4 g2 ko g3 gilashi.
3.5 m famfo ko famfo ruwa.
3.6 PH daidai Test Test takarda, wanda ke da ikon nuna a pH = 7 ± 0.1. Altylate sulfur naúrar.

4 hanyoyin nazari

4.1 prote presremi
Dishydrated Tafarnuwa an yi shi cikin barbashi uniform kuma sannan samfuri, narke tafarnuwa granules da tafarnuwa foda kai tsaye kai tsaye.
4.2 girma samfurin
Yin la'akari da samfurin 10G, cikakken zuwa 0.01g.
4.3
4.3.1 soaking
Sanya samfurin weigiled a cikin flask (3.1) tare da 100ml of 40ml na 40 ° C na Ciyar da Tsaro na ƙasa (3.3) a zazzabi na 37 ± 1 ° C Don 2h .
4.3.2 Distillation
Bayan ƙara 20ml na ethanol (2.2) da 2ml na ruwa parask (2.1), da sauri ya haɗu da walƙiya), kuma ƙara 10ml na ammonium hydroxide (2.5) zuwa ga mlayk ( 3.2) Saboda haka ƙananan mafi ƙarancin kayan kwalliyar ruwa ya nutsar a cikin maganin ammonium hydroxide.
Zafafa wuta (3.1) don dakatar da distillation bayan samun 60 ml na distillate, wanke cendenser da ruwa, da kuma tattara katako zuwa cikin wani conical flashk.
Ya kamata a yi amfani da zazzabi a lokacin distillation don guje wa yankuna mai gas kuma don samun adadin distillation da za a samu.
4.3.3
Neutralize da distillate (a) a cikin consk conical tare da nitric acid (2.4) kuma ka tsauraran pH a 7 ± 0.1 kamar yadda aka auna tare da takarda gwajin pH (3.6). A daidai Add 20.00 ml na daidaitaccen bayani na nitrate nitrate (2.6) zuwa distillate (a) da zafi a cikin wanka na ruwa a Reflux for 1 h. Da distillate (a) yana sanyaya zuwa zazzabi da kuma tace ta hanyar yin famfo tare da farar hula, (3.4) famfo na ruwa (3.5) da kuma an wanke shi tare da ruwan zafi. (3.4) Motar ruwa da aka wanke tare da ruwa mai zafi sau 4 da kuma wankon (b ) an tattara. 5 ml na nitric acid (2.1) da 'yan saukad da Ferric amonium sultalat in nuna alama (2.7) zuwa ga 0.1000 MOL / Layi da Motarate bayani (2.7) har zuwa mafita haske Brown-ja da kiyaye shi don 0.5 min.

5 lissafin sakamako na bincike

Hanyar lissafi ta 5.1
Abubuwan da ke cikin mahaɗan ƙwayoyin cuta a cikin tafarnuwa na narkewar da aka bayyana a matsayin kashi ɗaya daga cikin tsari mai zuwa: McVCX100057.0) 20 (21 ×××) 20 (21
A ina: X - Kayayyen abun ciki na mungiyoyin ƙwayoyin halitta a cikin tafarnuwa ta narke,%;
C1 - maida hankali ne na tsarin azurfa na azurfa (2.6), Mol / l;
C2 - Taro na ammonium pasocyanate misali bayani (2.7), Mol / l;
V - girma na ammonium pocolateate misali bayani cirsed, ml;
0.057 - grams of burnt propylated sulphur [(CH2CH=CH2)2S] equivalent to 1.00 mL of a standard solution of silver nitrate with C=1.000 mol/L;
m - taro na samfurin g. Sakamakon da aka samo zai bayyana ga wurare guda biyu.
5.2 Tsarin Hanyar
Ga irin wannan aiki, bambanci tsakanin sakamakon sakamako biyu ba zai wuce kashi 5 na tamanin ba, in ba haka ba maimaita ƙuduri.
Rahoton gwaji na 5.3
Theauki ma'anar ilimin lissafi na ƙuduri biyu a sakamakon sakamakon.

Annantuwa:

Ofishin da Ofishin ya gabatar da wannan ka'idojin da ba a tsallake da abincin da ba su da karfi na kasar Jamhuriyar Jama'ar Sin.
Wannan misali yana da alhakin kafa cibiyar bincike ta Beijing.
Babban dirar wannan daidaitaccen tsarin shen Bing, Liu Zhenfang, Liu Zhenfang, baya ga jiuzhen.
Ma'aikatar kasuwanci na Jamhuriyar Jama'ar Sin na 1988-02, 2013-07-01