JIS-H-1058-1987-ENG.pdf
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1、-, J I S H*1058 87 4933608 0050b0 b / / IS UDC 669.3 : 669.35 : 543.062 : 669.779 JAPANESE INDUSTRIAL STANDARD Methods for Determination of Phosphorus in Copper and Copper Alloys JIS H 1 0 5 8 - 1 9 8 7 Translated and Published by Japanese Standards Association Printed in Japan 6 s Copyright Japanes
2、e Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 02:48:50 MDTNo reproduction or networking permitted without license from IHS -,-,- In the event of any doubt arising, the original Standard in Japanese is to
3、be final authority. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 02:48:50 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S H*i1058 87 = Ll33bO8 0050b92 T /
4、 Applicable Standards, Corresponding International Standard and Reference Standards: See page 7. c UDC 669.3:669.35:543.062:669.779 JAPANESE INDUSTRIAL STANDARD J I S Methods for Determination of Phosphorus H 1058-1987 in Copper and Copper Alloys 1. ScoPe This Japanese Industrial Standard specifies
5、the methods for determination of phosphorus in copper and copper alloys (wrought copper and copper castings). 2. General Matters General matters common to the methods for chemical analysis shall be in accordance with JIS H 1012. 3. Classification of Determination Methods The method for determination
6、 of phosphorus shall be in accordance with either of the following standards. nation method shall be as given in Table 1. The applied alloy number of each determi- ( 1) Ammonium molybdophosphate precipitate separation sodium hydroxidewitric acid back titrimetric-method 0.03 wt% and over to 0.50 wt%
7、incl. in phosphorus content. This method applies to the sample of (2) Molybdo vanadophosphoric acid absorptiometry This method applies to the sample of 0.004 wt% and over to 0.50 wt% incl. in phosphorus content. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=
8、IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 02:48:50 MDTNo reproduction or networking permitted without license from IHS -,-,- 2 H 1058-1987 Table 1. Determination Method and Subject Alloy Number Alloy number c 1201 c 1220 c 1221 C 4250 C 5111 C 5102 C 5191 C 5210 C 5212 C
9、 5341 C 5441 C 6140 Reference Standard Ammonium molybdophosphate Molybdovanado- precipitate separation number ( informative hydroxide.nitric phosphoric acid ref e rence) acid back titrimetricmethod absorptiometry JIS H 3100 YIS H 3260 JIS H 3300 JIS H 3100 JIS H 3250 JIS H 3260 JIS H 3300 JIS H 3320
10、 JIS H 3401 O JIS H 3250 - O( O JIS H 3100 O() o. , JIS H 3100 O( O O O JI9 H 3110 JIS H 3270 O O JIS H 3110 JIS H 3270 O O JIS H 3110 JIS H 3270 JE3 H 3130 O O O O JIS H 3270 O O JIS H 3110 JIS H 3270 JIS H 3270 I O() I O JIS H 3100 I I O Note (I) This method applies to only the sample of 0.03 wt%
11、and over in phosphorus content. Remark: In the case of determination of phosphorus in copper alloy castings and copper alloy metal for castings, the classification of the determination method of each subject kind shall be specified in the Standard concerning the casting. 4. Ammonium Molybdophosphate
12、 Precipitate Separation Sodium HydroxideNitric Acid Back Titrimetric Method 4.1 Summary A sample is decomposed with nitric acid and hydrochloric acid and phosphorus is oxidized to phosphoric acid by heating. Phosphorus is precipitated by adding ammonium nitrate and hexaammonium heptamolybdate and fi
13、ltered. Thereafter, the precipitate is dissolved by adding a fixed amount of standard sodium hydroxide solution. The solution is joined by phenolphthalein as indicator and excess sodium hydroxide is titrated with standard nitric acid solution. Copyright Japanese Standards Association Provided by IHS
14、 under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 02:48:50 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S H*:L058 87 m 4733608 0050b4 3 m 3 H 1058-1987 4.2 Reagents The reagents shall be as follows: Hydrochloric ac
15、id Nitric acid Nitric acid (1 t 50, 1 + 5000) Ammonium nitrate Ammonium molybdate solution 40 g hexaammonium eptamo tetrahydrate dissolved by nitric acid ( rbdate is joined by 300 ml water and 80 ml aqueous ammonia, mixing and this solution is little by little added into 600 ml 1 + 1) by always stir
16、ring while cooling the solution in flowing water. If any precipitate exists, this solution is filtered to be used at each service. 0.1 mol/i (0.1 N) standard sodium hydroxide solution standardization, and calculation shall be in accordance with 4.4 (20.4) of JIS K 8001. Its preparation, 0.1 mol/i (0
17、.1 N) standard nitric acid solution 7.5 ml nitric acid is taken into a transfer flask of 1000 ml, and diluted to the marked line with water. The standardization of this solution shall be carried out as follows: Accurately take 25 ml 0.1 N standard sodium hydroxide solution, add phenolphthalein solut
18、ion as indicator, titrate it with 0.1 N standard nitric acid, allow the point at which red disappears to be the end point, and calculate the factor to 0.1 N from the following formula: 25 F=-XF V where p2: factor of 0.1 N standard nitric acid solution F : factor of 0.1 N standard sodium hydroxide so
19、lution v : used amount of 0.1 N standard nitric acid solution(m1) Phenolphthalein solution ethanol (95 vol %). 0.2 g phenolphthalein is dissolved with 100 ml 4.3 Weighing Out Amount of Sample The weighing out amount of a sample shall be, as a rule, as given in Table 2. Copyright Japanese Standards A
20、ssociation Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 02:48:50 MDTNo reproduction or networking permitted without license from IHS -,-,- 4 H 1058-1987 Table 2, Weighing Out Amount of Sample Phosphorus content wt% Weighing out
21、 amount of sample g 0.03 to 0.05 incl, 2.0 Over 0.05 to 0.20 incl, 1 .o Over 0.20 to 0.50 incl. 0.50 4 . 4 Operation The determination operation shall be conducted according to the following procedures: Weigh out a sample, transfer it into an Erlenmeyer flask (500 mi), add 5 ml hydrochloric acid and
22、 15 m nitric acid, and decompose them by heating on a water bath. Wash the inside wall of the Erlenmeyer flask with water, add 15 ml warm water and successively. keep it at 80 to 90 “C on a water bath for approx. 30 min. Thereafter, adjust the amount of solution at approx. 50 ml by adding water. Add
23、 15 g ammonium nitrate to this solution while keeping the solution temperature at approx. 6OoC, add 100 ml ammonium molybdate prelimi- narily heated at approx, 60C and sufficiently mix them by shaking for approx. 5 min, approx. 60C for 1 h and settle the generated precipitate. Thereafter, let it sta
24、nd still in a water bath at Filter this precipitate by using the filter paper (class 6) containing filter paper pulp(2), wash the Erlenmeyer flask and the precipitate by using nitric acid (1 + 50) until the color of copper ion disappears in washings and then, sufficiently wash them by using nitric a
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