Ammonium Sulfate CAS 7783-20-2 Zviri mukati 99.0~100.5%

(NH4)2SO4 132.14
Ammonium sulfate [7783-20-2].
DEFINITION
Ammonium Sulfate ine NLT 99.0% uye NMT 100.5% ye(NH4)2SO4.
KUZIVA
• A. Identification Tests-General, Ammonium <191>: Mhinduro (1 mu20) inosangana nezvinodiwa.
• B. Identification Tests-General, Sulfate <191>: Mhinduro (1 mu20) inosangana nezvinodiwa.
ASSAY
• Maitiro
Muenzaniso: 2.5 g yeammonium sulfate
Titrimetric system
(Ona Titrimetry <541>.)
Mode: Residual titration
Titrant: 1 N sodium hydroxide VS
Back titrant: 1 N sulfuric acid VS
Endpoint kuona: Colorimetric
Blank: 50.0 mL ye1 N sodium hydroxide VS, yakayerwa nemazvo
Ongororo: Wedzera Muenzaniso kune 500-mL conical flask uye nyunguduka mu50 mL yemvura.Wedzera 50.0 mL ye1 N sodium hydroxide VS, isa sefa funnel yakasununguka mumutsipa weflask, uye bika kusvikira ammonia yabudiswa (anenge 10-15 min), sezvakatemwa nepepa re litmus.Kutonhorera, wedzera 0.15 mL yethymol yebhuruu TS, uye titrate yakawandisa sodium hydroxide ne 1 N sulfuric acid VS.Ita chisungo chisina chinhu.
Verenga chikamu cheammonium sulfate [(NH4)2SO4] muSample yakatorwa:
Mhedzisiro = [(BV) × N × F ×100]/W
B = 1 N sulfuric acid VS inopedzwa neiyo Blank (mL)
V = 1 N sulfuric acid VS inopedzwa neSample (mL)
N = hunhu chaihwo hweiyo Back titrant (mEq/mL)
F = equivalency factor, 66.07 mg/mEq
W = uremu hweSample (mg)
Maitiro ekugamuchira: 99.0% -100.5%
KUSIRIRA
• Zvisaririra paIgnition <281>
Muenzaniso: 20 g
Maitiro ekugamuchira: NMT 0.005%
• Muganhu weInsoluble Matter
Muenzaniso: 20 g
Kuongorora: Tumira Sample mubeaker yakavharwa, uye nyungudusa mu200 mL yemvura.Kupisa kusvika pakuvira, uye kudziya pamvura yekugezera kwe1 h.Sefa mushonga unopisa kuburikidza netared sintered-girazi crucible yepakati porosity (10-15 µm).Shambai beaker uye sefa nemvura inopisa, omesa crucible pa105, inotonhorera mu desiccator, uye uremu.
Maitiro ekugamuchira: NMT 1 mg yezvinhu zvisinganyunguriki inowanikwa (0.005%).
• Muganhu wePhosphate
Standard phosphate solution, Phosphate reagent A, uye Phosphate reagent B: Gadzirira sezvakarongwa kune Phosphate muReagents pasi peReagents, Indicators, uye Solutions-General Tests for Reagents.
Muenzaniso: 4.0 g
Kudzora: 0.2 mL yeStandard phosphate solution
Analysis
[Cherechedza-Iyo bvunzo dzeSample uye Kudzora dzinoitwa zviri nani mune inofananidzwa ruvara-yekuenzanisa machubhu.]
Dissolve Sample mu 25 mL ye 0.5 N sulfuric acid, wedzera 1 mL imwe neimwe yePhosphate reagent A uye Phosphate reagent B, uye bvumira kumira pamhepo tembiricha kwemaawa maviri.Enderera neKudzora uchishandisa huwandu hwakafanana hweiyo reagents sezvakaita muyedzo yeSample.
Maitiro ekugamuchira: Chero ruvara rwebhuruu rwakawanikwa kubva kuSample harufanire kudarika rwakagadzirwa kubva kuDhivharo (NMT 5 ppm).
• Chloride uye Sulfate, Chloride <221>
Standard chloride solution: Kuendesa 165 mg yesodium chloride kune 100-mL volumetric flask.Dissolve in uye diluted nemvura kusvika kuhuwandu.Chinja 10.0 mL kune 1000-mL volumetric flask, uye dilue nemvura kusvika kuhuwandu kuti uwane mhinduro ine kusanganiswa kwe10 µg/mL yekloridi.
Maitiro ekugamuchira: Chikamu che 2-g hachicharatidzi kloridi kupfuura inoenderana ne1.0 mL yeStandard chloride solution (NMT 5 ppm).
• Muganho weNitrate
Yakajairika nitrate mhinduro uye Brucine sulfate mhinduro: Gadzirira sekurairwa kweNitrate muReagents pasi peReagents, Indicators, uye Solutions-General Tests yeReagents.
Sample solution: Dissolve 1.0 g in 3 mL yemvura nekudziisa mubhavhu remvura iri kufashaira, wobva wawedzera mushonga weBrucine sulfate kuita 50 mL.
Kudzora mhinduro: Ku 1.0 mL yeStandard nitrate solution wedzera 1.0 g yeammonium nitrate, wobva wawedzera mushonga weBrucine sulfate kuita 50 mL.
Chisina chinhu: 50 mL yeBrucine sulfate solution
Ongororo: Pisai Sample solution, Kudzora mhinduro, uye Blank mumvura inofashaira yekugezera kwemaminetsi gumi nemashanu neperiodic swirling zvinyoro nyoro, wobva watonhora nekukurumidza mubhavhu rechando kusvika kune tembiricha yekamuri.Gadzirisa yakakodzera spectrophotometer ine Blank kusvika zero absorbance pa410 nm.Sarudza kunyura kweSample solution, cherechedza mhedzisiro, uye gadzirisa chiridzwa neSample solution kune zero absorbance.Sarudza kunyura kweKudzora mhinduro.
Maitiro ekugamuchira: Kuverengera kuverenga kweSample mhinduro haipfuure iyo yeKudzora mhinduro (NMT 10 ppm).
• Simbi <241>
Sample solution: Dissolve 2.0 g mu 40 mL yemvura, wowedzera 2 mL yehydrochloric acid.
Maitiro ekugamuchira: NMT 5 ppm
ZVIYEDZO ZVAKANAKA
• Miedzo yeMicrobial Enumeration <61> uye Miedzo yeAkatsanangurwa Microorganisms <62>: The total aerobic microbial count haipfuure 1000 cfu/g, uye yakazara yakasanganiswa mold uye mbiriso count haipfuure 10 cfu/g.
• pH <791>: 5.0-6.0 mune mhinduro (1 mu20)
ZVIMWE ZVINODIWA
• Kurongedza uye Kuchengeta: Chengetedza mumidziyo yakavharwa zvakanaka.Hapana kuchengetedza zvinodiwa zvinotsanangurwa.