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Titanium dioxide. Determination of titanium dioxide. Complexometric titration method
catalogue
Method name
Instruments and equipment
applied range
Methodological principle
reagent
sample preparation
operation sequence/order
Method name returned to directory
Titanium dioxide. Determination of titanium dioxide. Complexometric titration method
Catalogue of instruments and equipment
Instruments and equipment: sample preparation: 1. EDTA disodium titration solution (0.05mol/l).
Take disodium EDTA 19g, add appropriate amount of water to dissolve it into 1000ml, and shake well.
Calibration: Take 0. 12g of reference zinc oxide, which is burned to constant weight at about 800℃, accurately weigh it, add 3ml of dilute hydrochloric acid to dissolve it, add 25ml of water, add 1 drop of 0.025% methyl red ethanol solution, drop ammonia test solution until the solution is slightly yellow, and add 25ml of water and ammonia-ammonium chloride buffer solution (pH/). Every 1ml EDTA titration solution (0.05mol/l) is equivalent to 4.069mg of zinc oxide. According to the consumption of the solution and the amount of zinc oxide, the concentration of the solution is calculated.
Storage: put it in a glass stopper bottle to avoid contact with rubber stopper and rubber tube.
2. Zinc titration solution (0.05 mol/L)
Preparation: Take 15g zinc sulfate (equivalent to about 3.3g zinc), add 100ml dilute hydrochloric acid and appropriate amount of water to dissolve into 1000ml, and shake well.
Calibration: accurately measure 25ml of this solution, add 1 drop 0.025% methyl red ethanol solution, drop ammonia test solution until the solution turns yellowish, add 25ml of water, ammonia-ammonium chloride buffer solution (ph 10.0) and a small amount of chrome black T indicator, and titrate the solution (0.05mol/l) with disodium EDTA. According to the consumption of EDTA disodium titration solution, the concentration of the solution is calculated.
Application scope back to the directory
This method uses titration to determine the content of titanium dioxide.
This method is suitable for titanium dioxide.
Method principle back to the directory
Place the sample in a platinum crucible, add 2g potassium carbonate and mix well at 900℃. C ignite for 30 minutes, cool, move the residue to a 100ml volumetric flask, add a mixture of 20ml water and 30ml hydrochloric acid, heat in a water bath until the solution is clear, cool, dilute to scale with water, shake well, accurately add 50ml EDTA disodium titration solution (0.05 mol/L), stand for 5 minutes, and add 65438+ methyl red indicator solution. Add 5g urotropine, dissolve it, add 1ml 0. 1% xylenol orange solution, and titrate with zinc titration solution (0.05mol/l) until the solution turns from orange to yellow, and finally to orange-red. Calculate the dosage of EDTA disodium titration solution (0.05mol/l) and the content of titanium dioxide.
Reagent catalogue
1. hydrochloric acid
2. Water
3. EDTA disodium titration solution (0.05 mol/L)
4. Reference zinc oxide
5. Methyl red indicator solution: take 0. 1g methyl red, add 7.4ml 0.05mol/l/L sodium hydroxide solution to dissolve it, and then add water to dilute it to 200ml.
6.20% sodium hydroxide solution
7. Zinc titration solution (0.05 mol/L)
8. Potassium carbonate
9. urotropine
1% xylenol orange solution
Sample preparation catalogue
1. EDTA disodium titration solution (0.05 mol/l)
Take disodium EDTA 19g, add appropriate amount of water to dissolve it into 1000ml, and shake well.
Calibration: Take 0. 12g of reference zinc oxide, which is burned to constant weight at about 800℃, accurately weigh it, add 3ml of dilute hydrochloric acid to dissolve it, add 25ml of water, add 1 drop of 0.025% methyl red ethanol solution, drop ammonia test solution until the solution is slightly yellow, and add 25ml of water and ammonia-ammonium chloride buffer solution (pH/). Every 1ml EDTA titration solution (0.05mol/l) is equivalent to 4.069mg of zinc oxide. According to the consumption of the solution and the amount of zinc oxide, the concentration of the solution is calculated.
Storage: put it in a glass stopper bottle to avoid contact with rubber stopper and rubber tube.
2. Zinc titration solution (0.05 mol/L)
Preparation: Take 15g zinc sulfate (equivalent to about 3.3g zinc), add 100ml dilute hydrochloric acid and appropriate amount of water to dissolve into 1000ml, and shake well.
Calibration: accurately measure 25ml of this solution, add 1 drop 0.025% methyl red ethanol solution, drop ammonia test solution until the solution turns yellowish, add 25ml of water, ammonia-ammonium chloride buffer solution (ph 10.0) and a small amount of chrome black T indicator, and titrate the solution (0.05mol/l) with disodium EDTA. According to the consumption of EDTA disodium titration solution, the concentration of the solution is calculated.
Operation returns to directory.
Take about 65438±0.0g of this product, accurately weigh it, put it in a platinum crucible, add 2g of potassium carbonate, and mix it at 900? C ignite for 30 minutes, cool, move the residue to a 100ml volumetric flask, add a mixture of 20ml water and 30ml hydrochloric acid, heat in a water bath until the solution is clear, cool, dilute to scale with water, shake well, accurately add 50ml EDTA disodium titration solution (0.05 mol/L), stand for 5 minutes, and add 65438+ methyl red indicator solution. Add 5g urotropine, dissolve it, add 1ml 0. 1% xylenol orange solution, and titrate with zinc titration solution (0.05mol/l) until the solution turns from orange to yellow, and finally to orange-red. Every 1ml EDTA titration solution (0.05mol/l) is equivalent to 3.995mg of titanium dioxide.
Note: "Accurate weighing" means that the weighing should be accurate to one thousandth of the weighing.
Titanium dioxide supplier
Company name: Shanghai Yuejiang Titanium Dioxide Chemical Co., Ltd.
Product description: Chinese name: titanium dioxide
English name: rutile
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Contact fax: 02 1-65867896
Website: www.yuejiangchem.com
Company name: Jiangsu Ai Kang Biomedical R&D Co., Ltd.
Product description: Chinese name: titanium dioxide
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Company & Annarji Chemical Company &; 3A (Anhui Zesheng Technology Co., Ltd.)
Product description: Chinese name: titanium dioxide
English name: titanium oxide
CASNo.: 13 17-80-2
Package information: 10g, 250g, 50g Remarks: rutile 99.99% (metal base).
Tel: 021-58432009400-005-6266
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English name: titanium oxide
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Company name: Weifang Woteng Import and Export Co., Ltd.
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Company name: Nanjing Xianfeng Nano Material Technology Co., Ltd.
Product description: Chinese name: Type B chemical purity of imported titanium dioxide nanowires.
English name: titanium oxide nanowire L:5 microns
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Package information: 5g Remarks: reagent grade diameter 10nm length 5 microns diameter 10nm length 5 microns.
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Company name: Beijing Yuhuan Century Chemical Technology Co., Ltd.
Product description: Chinese name: titanium dioxide
English name: titanium oxide
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Purity: 99.00% Packing information:100g (ml) .250g (ml) .500g (ml), 1kg (l), 25kg (l).
Tel: 400-8706899
Contact fax: 400-8706899
Website: www.chemicbook.com/showsupplierproduct16204/0.htm.
Company name: Shanghai Future Industry Co., Ltd.
Product description: Chinese name: titanium dioxide
English title: Rutile titanium oxide, 99.9% (calculated by metal).
CASNo.: 13 17-80-2
Purity: 99.9% 25nm Packing information: 300 yuan/500g Remarks: Future reagents.
Tel: 400-006640013621662912.
Contact fax: 02 1-55660885
Website:
Company name: Rizhao Lideshi Chemical Co., Ltd.
Product description: Chinese name: titanium dioxide
Purity: 5 10 note: according to customer requirements.
Tel: 010-51268198.
Contact fax: 0 10-63833209
Website: www.chemicbook.com/showsupplierproduct16250/0.htm.
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