Ammonium Sulfate CAS 7783-20-2 Maikaʻi 99.0~100.5%

(NH4)2SO4 132.14
Ammonium Sulfate [7783-20-2].
HOAKAKA
Aia ka Ammonium Sulfate i ka NLT 99.0% a me NMT 100.5% o (NH4)2SO4.
IKE
• A. Nā Ho'āʻo Identification-General, Ammonium <191>: Hoʻokō ka hopena (1 i ka 20) i nā koi.
• B. Identification Tests-General, Sulfate <191>: ʻO kahi hoʻonā (1 i ka 20) e hoʻokō i nā koi.
HANA
• Kaʻina hana
Laʻana: 2.5 g o ka Ammonium Sulfate
Pūnaehana Titrimetric
(E nānā i ka Titrimetry <541>.)
Ke ano: Koe titration
Titrant: 1 N sodium hydroxide VS
Hoʻopaʻa i hope: 1 N sulfuric acid VS
ʻIke hope: Colorimetric
Palekana: 50.0 mL o 1 N sodium hydroxide VS, ana pololei
Ka Nānā: E hoʻohui i ka Laʻana i loko o kahi pahu conical 500-mL a hoʻoheheʻe i 50 mL o ka wai.E hoʻohui i 50.0 mL o 1 N sodium hydroxide VS, e hoʻokomo i kahi funnel kānana ma ka ʻāʻī o ka ipu, a e hoʻolapalapa a hoʻokuʻu ʻia ka amonia (ma kahi o 10-15 min), e like me ka hoʻoholo ʻana me ka pepa litmus.E hooluolu, e hookomo i 0.15 mL o ka thymol blue TS, a e hoemi i ka sodium hydroxide keu me 1 N sulfuric acid VS.Hana i kahi hoʻoholo hakahaka.
E helu i ka pākēneka o ka ammonium sulfate [(NH4)2SO4] ma ka Laʻana i lawe ʻia:
Ka hopena = [(BV) × N × F ×100]/W
B = 1 N ʻakika sulfuric VS i hoʻopau ʻia e ka Blank (mL)
V = 1 N ʻakika sulfuric VS i hoʻopau ʻia e ka Laʻana (mL)
N = maʻamau maoli o ka titrant Back (mEq/mL)
F = helu kaulike, 66.07 mg/mEq
W = ke kaumaha o ka Laʻana (mg)
Nā mea e ʻae ai: 99.0%-100.5%
NA mea haumia
• Koena ma ka Ignition <281>
Laʻana: 20 g
Nā pae ʻae ʻae: NMT 0.005%
• Ka palena o ka mea hiki ole ke hooheheeia
Laʻana: 20 g
Nānā: E hoʻoneʻe i ka Laʻana i loko o kahi pahu i uhi ʻia, a hoʻoheheʻe ʻia i 200 mL o ka wai.E wela a hoʻolapalapa, a hoʻomaʻamaʻa i ka ʻauʻau mahu no 1 h.E kānana i ka ʻoluʻolu wela ma o ka ipu aniani hoʻoheheʻe ʻia me ka porosity waena (10-15 µm).E holoi i ka beaker a me ka kānana me ka wai wela, e hoʻomaloʻo i ka pahu ma 105, e hoʻolili i loko o ka desiccator, a kaupaona.
Nā pae hoʻoholo: NMT 1 mg o ka mea hiki ʻole ke loaʻa (0.005%).
• Ka palena o ka Phosphate
ʻO ka solution phosphate maʻamau, Phosphate reagent A, a me Phosphate reagent B: E hoʻomākaukau e like me ke kuhikuhi ʻana no ka Phosphate i loko o nā Reagents ma lalo o nā Reagents, Indicators, and Solutions—General Tests for Reagents.
Laʻana: 4.0 g
Manaʻo: 0.2 mL o ka hopena phosphate maʻamau
Kānāwai
[E hoʻomaopopo-ʻoi aku ka maikaʻi o nā hoʻāʻo no ka Laʻana a me ka Mana Mana i loko o nā paipu hoʻohālikelike kala.]
E hoʻoheheʻe i ka Laʻana i 25 mL o 0.5 N sulfuric acid, e hoʻohui i 1 mL i kēlā me kēia o ka Phosphate reagent A a me ka Phosphate reagent B, a e ʻae e kū ma ka lumi wela no 2 mau hola.E hoʻomau me ka Mana e hoʻohana i nā nui like o nā reagents like me ka hoʻāʻo no ka Laʻana.
Paʻa ʻae ʻia: ʻAʻole pono nā kala polū i loaʻa mai ka Laʻana mai ka mea i hana ʻia mai ka Mana Mana (NMT 5 ppm).
• Chloride a me Sulfate, Chloride <221>
ʻO ka hopena chloride maʻamau: E hoʻololi i ka 165 mg o ka sodium chloride i loko o kahi pahu volumetric 100-mL.E hoʻoheheʻe i loko a hoʻoheheʻe me ka wai i ka nui.E hoʻololi i ka 10.0 mL i loko o ka pahu volumetric 1000-mL, a e hoʻoheheʻe ʻia me ka wai i ka leo e loaʻa ai ka hopena me ka 10 µg/mL o ka chloride.
Nā pae ʻae ʻae: ʻAʻole hōʻike ʻia kahi ʻāpana 2-g i ka chloride ma mua o ka 1.0 mL o ka solution chloride maʻamau (NMT 5 ppm).
• Ka palena o ka Nitrate
ʻO ka solution nitrate maʻamau a me ka solution Brucine sulfate: E hoʻomākaukau e like me ke kuhikuhi ʻana no ka Nitrate in Reagents ma lalo o Reagents, Indicators, and Solutions-General Tests for Reagents.
Laʻana hoʻonā: E hoʻoheheʻe i 1.0 g i 3 mL o ka wai ma ka hoʻomehana ʻana i ka ʻauʻau wai paila, a hoʻohui i ka solution Brucine sulfate e lilo i 50 mL.
Hoʻonā mana: E hoʻohui i ka 1.0 mL o ka solution nitrate maʻamau i 1.0 g o ka ammonium nitrate, a laila e hoʻohui i ka solution Brucine sulfate e lilo i 50 mL.
Palekana: 50 mL o ka solution Brucine sulfate
Nānā: E wela i ka hāpana laʻana, ʻO ka hoʻonā hoʻomalu, a me Blank i loko o kahi ʻauʻau wai paila no 15 mau minuke me ka wili mālie ʻana, a laila e hoʻomaʻalili wikiwiki i ka ʻauʻau hau a hiki i ka lumi wela.Hoʻoponopono i kahi spectrophotometer kūpono me ka Blank a i ʻole ke komo ʻana ma 410 nm.E hoʻoholo i ke komo ʻana o ka hāpana laʻana, e nānā i ka hopena, a hoʻoponopono i ka mea hana me ka Sample solution i ʻole absorbance.E hoʻoholo i ka komo ʻana o ka hoʻonā Mana.
Paʻa ʻae: ʻAʻole i ʻoi aku ka heluhelu ʻana o ka absorbance no ka Sample solution i kēlā no ka hoʻonā Control (NMT 10 ppm).
• Hao <241>
Laʻana hoʻonā: E hoʻoheheʻe i 2.0 g i 40 mL o ka wai, a hoʻohui i 2 mL o ka waikawa hydrochloric.
Nā pae ʻae ʻae: NMT 5 ppm
NA HOAO KUAI
• Nā ho'āʻo helu microbial <61> a me nā ho'āʻo no nā microorganism i koho ʻia <62>: ʻAʻole ʻoi aku ka nui o ka helu microbial aerobic ma mua o 1000 cfu/g, a ʻaʻole ʻoi aku ka nui o nā mold a me nā huʻu i hui ʻia ma mua o 10 cfu/g.
• pH <791>: 5.0-6.0 i loko o kahi hoʻonā (1 i ka 20)
NA KOI HOU
• Hoʻopili a me ka waiho ʻana: mālama i loko o nā pahu paʻa maikaʻi.ʻAʻole i kuhikuhi ʻia nā koi mālama.