Ammonium Sulfate CAS 7783-20-2 Zomwe zili 99.0~100.5%

(NH4)2SO4 132.14
Ammonium Sulfate [7783-20-2].
TANTHAUZO
Ammonium Sulfate ili ndi NLT 99.0% ndi NMT 100.5% ya (NH4)2SO4.
CHIZINDIKIRO
• A. Identification Tests-General, Ammonium <191>: Yankho (1 mu 20) limakwaniritsa zofunikira.
• B. Identification Tests-General, Sulfate <191>: Yankho (1 mu 20) limakwaniritsa zofunikira.
ZOYESA
• Ndondomeko
Chitsanzo: 2.5 g wa ammonium sulfate
Titrimetric system
(Onani Titrimetry <541>.)
Mawonekedwe: Matchulidwe otsalira
Titrant: 1 N sodium hydroxide VS
Kubwerera kumbuyo: 1 N sulfuric acid VS
Kuzindikira komaliza: Colorimetric
Chopanda kanthu: 50.0 mL ya 1 N sodium hydroxide VS, yoyezedwa molondola
Kusanthula: Onjezani Chitsanzo mu botolo la 500-mL ndikusungunula mu 50 ml ya madzi.Onjezani 50.0 mL ya 1 N sodium hydroxide VS, ikani nsoni ya fyuluta momasuka pakhosi la botolo, ndipo wiritsani mpaka ammonia itatulutsidwa (pafupifupi 10-15 min), monga momwe zimakhalira ndi pepala la litmus.Ozizira, onjezani 0.15 mL ya thymol blue TS, ndi titrate owonjezera sodium hydroxide ndi 1 N sulfuric acid VS.Chitani chitsimikiziro chopanda kanthu.
Kuwerengera kuchuluka kwa ammonium sulfate [(NH4)2SO4] mu Zitsanzo zomwe zatengedwa:
Zotsatira = [(BV) × N × F ×100]/W
B = 1 N sulfuric acid VS yodyedwa ndi Chopanda kanthu (mL)
V = 1 N sulfuric acid VS yogwiritsidwa ntchito ndi Chitsanzo (mL)
N = chikhalidwe chenicheni cha Back titrant (mEq/mL)
F = chinthu chofanana, 66.07 mg/mEq
W = kulemera kwa Zitsanzo (mg)
Zovomerezeka zovomerezeka: 99.0% -100.5%
ZOCHITSA
• Zotsalira pa Ignition <281>
Chitsanzo: 20 g
Njira zolandirira: NMT 0.005%
• Malire a Zinthu Zosasungunuka
Chitsanzo: 20 g
Kusanthula: Tumizani Zitsanzozo ku beaker yophimbidwa, ndikusungunula mu 200 ml ya madzi.Kutenthetsa mpaka kuwira, ndi kutentha pamadzi osambira kwa 1 h.Sefa madzi otentha kudzera mumtsuko wagalasi wonyezimira wa porosity wapakati (10-15 µm).Sambani beaker ndi fyuluta ndi madzi otentha, zimitsani crucible pa 105, kuziziritsa mu desiccator, ndi kulemera.
Njira zolandirira: NMT 1 mg ya zinthu zosasungunuka zimapezeka (0.005%).
• Malire a Phosphate
Njira yokhazikika ya phosphate, Phosphate reagent A, ndi Phosphate reagent B: Konzekerani monga momwe mwauzira Phosphate mu Reagents pansi pa Reagents, Indicators, and Solutions—General Tests for Reagents.
Chitsanzo: 4.0 g
Kuwongolera: 0,2 mL ya Standard phosphate solution
Kusanthula
[Zindikirani-Mayeso a Zitsanzo ndi Kuwongolera amapangidwa makamaka m'machubu ofananitsa mitundu.]
Sungunulani Zitsanzozo mu 25 ml ya 0.5 N sulfuric acid, onjezerani 1 mL iliyonse ya Phosphate reagent A ndi Phosphate reagent B, ndipo mulole kuyimirira pa kutentha kwa maola awiri.Chitani ndi Control ntchito zedi ofanana reagents monga mu mayeso kwa Zitsanzo.
Njira zolandirira: Mtundu uliwonse wabuluu wopezedwa kuchokera ku Zitsanzo suyenera kupitirira womwe umapangidwa kuchokera ku Control (NMT 5 ppm).
• Chloride ndi Sulfate, Chloride <221>
Njira yokhazikika ya chloride: Tumizani 165 mg ya sodium chloride ku botolo la volumetric 100-mL.Sungunulani ndi kuchepetsa ndi madzi kuti voliyumu.Tumizani 10.0 mL ku botolo la voliyumu ya 1000-mL, ndi kusungunula ndi madzi kuti mufike pa voliyumu kuti mupeze yankho lokhala ndi 10 µg/mL wa chloride.
Njira yolandirira: Gawo la 2-g limawonetsa kuti palibe kloridi yochulukirapo kuposa 1.0 mL ya Standard chloride solution (NMT 5 ppm).
• Malire a Nitrate
Standard nitrate solution ndi Brucine sulfate solution: Konzekerani monga momwe mwalangizidwira Nitrate mu Reagents pansi pa Reagents, Indicators, ndi Solutions-General Tests for Reagents.
Chitsanzo cha yankho: Sungunulani 1.0 g mu 3 mL wa madzi potenthetsa mu bafa la madzi otentha, ndi kuwonjezera mankhwala a Brucine sulfate kupanga 50 ml.
Njira yothetsera: Pa 1.0 mL ya Standard nitrate solution onjezerani 1.0 g wa ammonium nitrate, kenaka yikani mankhwala a Brucine sulfate kupanga 50 ml.
Chopanda kanthu: 50 mL ya Brucine sulfate solution
Kusanthula: Yatsani Sample solution, Control solution, ndi Chopanda kanthu m'madzi osamba otentha kwa mphindi 15 ndikuzungulira pang'onopang'ono, kenaka muziziziritsa mwachangu mumadzi oundana mpaka kutentha.Sinthani spectrophotometer yoyenera ndi Chopanda kanthu mpaka zero absorbance pa 410 nm.Tsimikizirani kuyamwa kwa Sample solution, zindikirani zotsatira zake, ndikusintha chidacho ndi Sample solution kuti chisamuke.Tsimikizirani kuyamwa kwa Control solution.
Njira zovomerezera: Kuwerengera kwa kuyamwa kwa Sample solution sikudutsa pa Control solution (NMT 10 ppm).
• Chitsulo <241>
Chitsanzo cha yankho: Sungunulani 2.0 g mu 40 ml ya madzi, ndi kuwonjezera 2 mL wa hydrochloric acid.
Njira zolandirira: NMT 5 ppm
MAYESO AKE
• Mayeso a Microbial Enumeration <61> ndi Mayesero a Tizilombo Zodziwika <62>: Chiwerengero chonse cha aerobic microbial sichidutsa 1000 cfu / g, ndipo kuchuluka kwa nkhungu ndi yisiti sikudutsa 10 cfu / g.
• pH <791>: 5.0-6.0 mu yankho (1 mu 20)
ZOWONJEZERA ZOFUNIKA
• Kupaka ndi Kusunga: Sungani m’zotengera zotsekedwa bwino.Palibe zofunikira zosungira zomwe zafotokozedwa.