I-Ammonium Sulfate CAS 7783-20-2 Okuqukethwe 99.0~100.5%

(NH4)2SO4 132.14
I-Ammonium Sulfate [7783-20-2].
INCAZELO
I-Ammonium Sulfate iqukethe i-NLT 99.0% kanye ne-NMT 100.5% ye-(NH4)2SO4.
UKUKHOMBA
• A. I-Identification Tests-General, Ammonium <191>: Isixazululo (1 kokungu-20) sihlangabezana nezimfuneko.
• B. I-Identification Tests-General, Sulfate <191>: Isixazululo (1 kokungu-20) sihlangabezana nezimfuneko.
ISIVIVINYO
• Inqubo
Isampula: 2.5 g ye-Ammonium sulfate
Isistimu ye-Titrimetric
(Bheka i-Titrimetry <541>.)
Imodi: I-titration eyinsalela
I-Titrant: 1 N sodium hydroxide VS
I-back titrant: 1 N sulfuric acid VS
Ukutholwa kwendawo yokugcina: Colorimetric
Akunalutho: 50.0 mL ye-1 N sodium hydroxide VS, ikalwe ngokunembile
Ukuhlaziya: Engeza Isampula ku-500-mL ye-conical flask bese uhlakaza ku-50 mL wamanzi.Engeza u-50.0 mL we-1 N sodium hydroxide VS, beka ifaneli yokuhlunga ngokukhululekile entanyeni yeflask, bese ubilise kuze kukhishwe i-ammonia (cishe imizuzu eyi-10-15), njengoba kunqunywa ngephepha le-litmus.Phola, engeza u-0.15 mL we-thymol blue TS, bese uthambisa i-sodium hydroxide eyeqile nge-1 N sulfuric acid VS.Yenza isinqumo esingenalutho.
Bala iphesenti le-ammonium sulfate [(NH4)2SO4] Kusampula ethathiwe:
Umphumela = [(BV) × N × F ×100]/W
B = 1 N sulfuric acid VS edliwe yi-Blank (mL)
V = 1 N sulfuric acid VS esetshenziswe Isampula (mL)
N = ukujwayelekile kwangempela kwe-Back titrant (mEq/mL)
F = i-equivalency factor, 66.07 mg/mEq
W = isisindo sesampula (mg)
Indlela yokwamukela: 99.0% -100.5%
UKUNGCOLA
• Izinsalela Ekuthutheni <281>
Isampula: 20 g
Indlela yokwamukela: NMT 0.005%
• Umkhawulo Wento Engancibiliki
Isampula: 20 g
Ukuhlaziya: Dlulisela Isampula kubhekha olumboziwe, bese uhlakaza ku-200 mL wamanzi.Ukushisa kuze kube sekubileni, futhi kufudumele kubhavu we-steam ihora elingu-1.Hlunga isixazululo esishisayo ngokusebenzisa ingilazi ene-tared sintered crucible of medium porosity (10-15 µm).Geza ibhikha nesihlungi ngamanzi ashisayo, womisa i-crucible ku-105, uphole ku-desiccator, bese ukala.
Indlela yokwamukela: I-NMT 1 mg yento engancibiliki iyatholakala (0.005%).
• Umkhawulo wePhosphate
Isixazululo se-phosphate esijwayelekile, i-Phosphate reagent A, kanye ne-Phosphate reagent B: Lungiselela njengoba kuqondiswe ku-Phosphate ku-Reagents ngaphansi kwe-Reagents, Izinkomba, kanye Nezixazululo-Ukuhlolwa Okujwayelekile Kwama-reagents.
Isampula: 4.0 g
Ukulawula: 0.2 mL yesisombululo se-phosphate Standard
Ukuhlaziya
[Qaphela-Ukuhlolwa Kwesampula Nokulawula kwenziwa ngokukhethayo ngamashubhu okuqhathanisa umbala.]
Chaza Isampula ku-25 mL ka-0.5 N sulfuric acid, engeza u-1 mL ngayinye ye-Phosphate reagent A ne-Phosphate reagent B, bese uvumela ukuthi ime endaweni yokushisa yasekamelweni amahora ama-2.Qhubeka nokulawula usebenzisa amanani afanayo ama-reagents afanayo njengasekuhlolweni Kwesampula.
Indlela yokwamukela: Noma yimuphi umbala oluhlaza okwesibhakabhaka otholwe Kusampula akufanele udlule lowo okhiqizwe ku-Control (NMT 5 ppm).
• I-Chloride ne-Sulfate, i-Chloride <221>
Isixazululo se-chloride esijwayelekile: Dlulisa u-165 mg we-sodium chloride ku-100-mL ye-volumetric flask.Chaza bese uhlanza ngamanzi ngevolumu.Dlulisela u-10.0 mL kuflask yevolumu yevolumu engu-1000-mL, bese uhlambulula ngamanzi ukuya kuvolumu ukuze uthole isisombululo esinengxube engu-10 µg/mL ye-chloride.
Imibandela yokwamukela: Ingxenye engu-2-g ayibonisi i-chloride eningi kunokuhambisana no-1.0 mL we-Standard chloride solution (NMT 5 ppm).
• Umkhawulo weNitrate
Isixazululo esijwayelekile se-nitrate kanye nesisombululo se-Brucine sulfate: Lungiselela njengoba kuqondiswe ku-Nitrate kumaReagents ngaphansi kwamaReagents, Izinkomba, kanye Nokuhlolwa Okujwayelekile Kwezixazululo Zama-reagents.
Isixazululo esiyisampula: Chaza u-1.0 g ku-3 mL wamanzi ngokufudumeza emanzini okugeza abilayo, bese wengeza isixazululo se-Brucine sulfate ukwenza u-50 mL.
Isixazululo sokulawula: Ku-1.0 mL wesisombululo se-nitrate esijwayelekile engeza u-1.0 g we-ammonium nitrate, bese wengeza isixazululo se-Brucine sulfate ukwenza u-50 mL.
Akunalutho: 50 mL wesixazululo seBrucine sulfate
Ukuhlaziya: Shisisa Isixazululo Sesampula, Isixazululo Sokulawula, futhi Akunalutho kubhavu wamanzi abilayo imizuzu engu-15 ngokushwiba okuthambile ngezikhathi ezithile, bese upholisa ngokushesha endaweni yokugezela eqhweni kuya ekamelweni lokushisa.Lungisa i-spectrophotometer efanelekile ene-Blank ibe yi-zero absorbance ku-410 nm.Nquma ukumunca kwesisombululo Sesampuli, qaphela umphumela, bese ulungisa ithuluzi ngesixazululo Sesampula ukuze lingamubiki.Nquma ukumuncwa kwesixazululo Sokulawula.
Imibandela yokwamukela: Ukufundwa kokumunca kwesisombululo Sesampuli akudluli lokho kwesixazululo Sokulawula (NMT 10 ppm).
• I-ayina <241>
Isixazululo esiyisampula: Chaza u-2.0 g ku-40 mL wamanzi, bese wengeza u-2 mL we-hydrochloric acid.
Indlela yokwamukela: NMT 5 ppm
IZIVIVINYO EZITHILE
• Ukuhlolwa Kokubala Kwama-Microbial <61> kanye Nokuhlolwa Kwamagciwane Acacisiwe <62>: Isamba sesibalo se-aerobic microbial asidluli ku-1000 cfu/g, futhi isamba sesibalo sesikhunta esihlanganisiwe neyeast asidluli ku-10 cfu/g.
• I-pH <791>: 5.0-6.0 esixazululweni (1 ku-20)
IZIDINGO EZENGEZIWE
• Ukupakisha Nokugcina: Londoloza ezitsheni ezivalwe kahle.Azikho izidingo zesitoreji ezishiwo.