- 0Phenantrolin Cloroform
V.2. Pha dung dich
V.2.LChudn bi dung dich KH2POJ ndng do 2/jgPlml
Can chfnh xac tren can phan tfch 0,1757g KH.PO4 loai PẠ chuyen dinh lupng vao binh dinh mure sach dung tfch 1000 ml, them nudc cat den 2/3 the tich binh, lac cho tan tinh the, them nuc^fc den vaeh muc, day niit, lac deụ Dung dich thu dupe cd ndng dp 40mgP/l. Khi su dung, dijng pipet lay chfnh xac 50ml dung dich nay, chuyen vao binh dinh muc dung tfch 1 1ft them nudc den vaeh muc, day nut, lac deụ Dung dich KH.PÔ thu dupe cd ndng dp 2^gP/ml.
V.2.2. Chudn bi thudc thu Molipdat.
Hoa tan hoan toan 6 gam (NHJMôỌ^.AH.o va 0,1 gam NaSbOQH^Ô vao 800 ml H.SO4 2M. Sau đ chuyen vao binh dinh muc sach cd dung tfch
1000 ml them H^SÔ 2M den vaeh muc, day nut, lac deụ
V.2.3. Chudn bi dung dich axit ascobic 2%.
Hoa tan 2 gam axit ascobic bang nUdc cat, chuyen dinh hn/ng vao binh dinh muc sach dung tich 100 ml, them nude cat den vaeh muc, day nut, lac deụ
V.2.4. Chudn bi dung dich nhom sunfat co ndng do lOfugAUml
Can chfnh xac tren can phan tfch 1,2314 gam Al2(S04)3.18 H^O loai PA, chuyen vao binh dinh muc sach dung tfch 1000 ml, them nudc cat den 2/3 the tfch ciia binh, lac cho tan het tinh the, them nude den vaeh muc, day niit, lac deụ Sau đ dijng pipet lay 10 ml dung dich tren chuyen vao binh dinh mure dung tich 100 ml, them nucrc den vaeh muc, day nut, lac deụ Dung dich thu dupe cd ndng do 10 j.ig Al/ml.
V.2.5. Chudn bi dung dich 8-hidroxiquinolin 1%.
Hda tan hoan toan L5 gam 8-hidroxiquinolin trong 100 ml cloroform. Dung dich thu dupe cd ndng dp khoang 1% 8-hidr()xiquin()lin trong cloroform.
V.2.6. Chudn bi dung dich mudi sat co nong dp lO/ugFelml
chuyen vao binh dinh muc dung tfch 1000 ml, them nudc den 2/3 the tfch binh lac cho tan het tinh the, them nudc den vaeh muc, day nut, lac deụ Sau đ lay 10 ml dung dich tren pha thanh 250 ml trong binh dinh muc. Dung dich thu dupe cd ndng dp 10 |ig Fe/ml.
V.2.7. Chudn bi dung dich Na2SiF^ co ndng do 5^6/jgSi/ml
Can chfnh xac tren can phan tfch 0,1880g NâSiF^ loai PA, chuyen vao cdc dung tfch 500ml, them 400 ml nudc cat. dun ndng cho tan het, dê ngudi, chuyen dinh lupng vao binh dinh muc 500 ml. them nudc cat den vaeh mire day nut, lac deụ Lay 25 ml dung dich nay, chuyen vao binh dinh muc dung tfch 250ml, them nudc den vaeh muc, day nut, lac deụ Dung dich thu dupe cd ndng dp 5,6|.igSi/ml.
V.2.8. Chudn bi dung dich chudn NaF co nong do 20mgFll
Can chfnh xac tren can phan tfch l,1055gam NaF loai PA, chuyen dinh lupng vao binh dinh muc sach dung tfch lOOOml, them nU(Vc cat den vaeh muc, day niit, lac deụ Ta thu dupe dung dich c(') ndng do 5()0mgF/l- Dung pipcl lay chfnh xac 10ml dung dich tren, chuyen vao binh dinh muc 25()ml. Them nudc den vaeh muc, day niit, lac deụ Dung dich thu dupe cd ndng do 2()mgF/l.
V.2.9. Chudn bi dung dich axit H2S0^ 2\L
Lay 107 ml H.SÔ 98%, rdt tii tu vao cdc dung tfch 1 1ft chua san 800 ml nudc cát, vira rdt vua khuay deu, de ngudị Sau đ chuyen vao binh dinh muc, them nudc den vaeh muc, day niit, lac deụ Dung dich thu dupe cd ndng do H^SÔ 2M va dupe diing de pha loang thanh cac dung dich H-^SÔ cd ndng do can thiet.
V.2.10. Chudn bi dung dich KOH OJN
Can nhanh tren can ky thuat 5,6gam KOH vien, cho vao cdc sach dung tfch 500ml, them 30()ml nude cat, khuay cho lan het tinh the, de ngudi, chuyen vao binh dinh mirc 1 1ft, them nudc cát den vaeh muc, day mil, lac deụ None do KOH tronc dun^^ dich ductc kiem tra bans each chuan đ vdi dunsi dich axit chuan, chi thi phenolphtalein.
V.2JL Pha dung dich NaOH 5M
Diing dng dong lay 250ml nudc cat rdt vao cdc chiu nhiet, dung tfch
500ml. Can nhanh 50gam NaOH vien tren can ky thuat, chuyen vao coc. khuay cho tan het NaOH, de ngudị Dung dich thu duac co ndng do NaOH
gan diing la 5M va dupe diing de pha loang den ndng dp can thiet khi su dung.
V.2.I2. Chudn bi dung dich o-phenaltrolin 0,5%.
Hda tan hoan toan 0,5 (g) o-phenaltrolin trong 100 ml dung dich H.SÔ 0,005 M. Dung dich thu dupe cd ndng do 0,5% o-phenaltrolin trong H.SÔ 0,005 M.
V.2.I3. Chudn bi dung dich sat (III) clorua
Can chfnh xac tren can phan tfch l,4484g FeCl^. Qiuyen dinh lupng vao binh dinh muc dung tfch lOOOmI, them lOml dung dich H.SÔ 2M, them nink* cat den vaeh muc, day niit, lac deụ Dung dich thu dupe cd ndng dp
500mgFe/l va dupe diing de pha h)ang thanh cac dung dich FeCl ^ co ndng do
nh(') hem tuy theo yeu cau ciia thf nghiem.
V.2.I4. Chudn bi huyen phu sHa voi
Nghien nhd khoang 20g CaO men nung trong cdi su, chuyen toan bn vao cdc dung tfch lOOOmI, them khoang 500ml nudc cat va khuay deu trong 30 phiit. Sau đ de yen khoang 15 phiit, gan thu lay phan huyen phij phfa tren. Ndng dp Ca""*" trong phan huyen phii dupe xac dinh theo phuctng phap complexon nhu da neu d muc 5.4. Tliem lupng nudc da tfnh toan trudc vao cdc, khuay deu dé thu dupe huyen phu cd chua 80()0mgCa/l. Huyen phiJ CăOH)3 ^h^ dupe d tren dupe giu trong binh thuy tinh niit nham de tranh tiep xiic vdi khdng khf. Cac huyen phu CăOH)-, cd ndng dp nhd hon su dung trong qua trinh nghien cuu dupe pha loang tii hu\'en phii CăOH)2 cd ndng dp 8000mgCa/ldlren.
V.2.I5. Chudn bi thudc thuzirconi-alizarin S
-I- Can chfnh xac tren can phan tfch 2,1750g Zr(NO J4.5H3Ọ chuyen dinh
lucTng vao binh dinh muc cd 250ml, them nU('rc cat den vaeh muc. lac deụ Dung dich thu dupe cd ndng do 0,87% ZrCNO Jj.5H.O trong nU(7c.
+ Can chfnh xac tren can phan tfch 0,4253g alizarin đ (Ci4H707SNạH-,0), chuyen dinh lupng vao binh dinh muc cd 250ml, them (Ci4H707SNạH-,0), chuyen dinh lupng vao binh dinh muc cd 250ml, them nudc cat den vaeh muc, lac deụ Dung dich thu dupe cd ndng dp 0,17% alizarin đ trong nudc cat.
+ Diing pipet lay chfnh xac 25ml dung dich 17% alizarin đ cho vao binh dinh miirc cd 250ml, them tir tir 25ml dung dich Zr(N03),.5H.O 0,87%, them dinh miirc cd 250ml, them tir tir 25ml dung dich Zr(N03),.5H.O 0,87%, them nudc cát den vaeh muc, day niit, lac deu va de yen trong tdi, sau 24h dung dich dupe dem su diing.