YS/T 1075.2-2015 (YST1075.2-2015)

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YS/T 1075.2-2015	English	179	Add to Cart	3 days [Need to translate]	Methods for chemical analysis of vanadium-aluminium and molybdenum-aluminium master alloys. Part 2: Determination of molybdenum content. Lead-molybdate gravimetry	YS/T 1075.2-2015		YS/T 1075.2-2015

YS/T 1075.2-2015
(Vanadium aluminum, molybdenum intermediate aluminum alloys - Part 2. Determination of lead molybdate molybdenum content - Gravimetric method)
ICS 77.120.99
H14
People's Republic of China Nonferrous Metals Industry Standard
Aluminum vanadium, molybdenum intermediate aluminum alloys -
Part 2. Determination of molybdenum content
Lead molybdate gravimetric method
Part 2. Determinationofmolybdenumcontent-
Issued on. 2015-04-30
2015-10-01 implementation
Ministry of Industry and Information Technology of the People's Republic of China released
Foreword
YS/T 1075 "aluminum vanadium, molybdenum intermediate aluminum alloy chemical analysis method" including a total of 8 sections.
--- Part 1. Determination of iron content - 1,10-phenanthroline spectrophotometry;
--- Part 2. Determination of molybdenum content of lead molybdate gravimetric method;
--- Part 3. Determination of silicon content - Molybdenum blue spectrophotometric method;
--- Part 4. vanadium content - Inductively coupled plasma atomic emission spectrometry and ferrous ammonium sulfate titration;
--- Part 5. Determination of aluminum content EDTA titration;
--- Part 6. Determination of carbon content in the high-frequency combustion - infrared absorption method;
--- Part 7. Determination of the amount of oxygen in the inert gas fusion - infrared method;
--- Part 8. molybdenum, aluminum X- determining the amount of fluorescence spectroscopy.
This section YS/T 1075 Part 2.
This section drafted in accordance with GB/T 1.1-2009 given rules.
The non-ferrous metal part by the National Standardization Technical Committee (SAC/TC243) and focal points.
This section is drafted. big Chengde Vanadium Industry Co., Ltd., Northwest Nonferrous Metal Research Institute, Shangluo Amano Advanced Materials Co., Ltd.
Baoji Titanium Group Ltd., high-tech Donggang East Metal Materials Co., Ltd. Dalian Rong Gaudet kinds of materials, Powder Metallurgy, Central South University
Gold Institute, Guangzhou Nonferrous Metal Research Institute.
The main drafters of this section. Li Jianxin, Liu Jianfeng, Sunbao Lian, Lin Xuemei, Wang Jinlei, Li Bo, Xue Liying, Lizhi De, Lei Miao, Luo policy,
Zou Deling, ADMINISTRATION AND TECHNIQUE Lou month, Wang Changjun, Zheng Lingzhi, Tan Zhaohui, Zhang Tian Jiao, Ying Huang Pu.
Aluminum vanadium, molybdenum intermediate aluminum alloys -
Part 2. Determination of molybdenum content
Lead molybdate gravimetric method
1 Scope
YS/T 1075 This section specifies the method for the determination of molybdenum content in the molybdenum alloy with aluminum.
This section applies to the determination of the amount of molybdenum and molybdenum alloy with aluminum. Measurement range. 45.00% - 95.00%.
2 Method summary
Samples with hydrochloric acid - nitric acid mixture dissolved. Acetic acid at pH 5 to 7 - ammonium acetate medium, lead molybdate and lead molybdate precipitate generated acid,
Burning at 550 ℃ ~ 600 ℃ to constant weight, weighing, in terms of molybdenum content.
3 Reagents
3.1 hydrochloric acid - nitric acid mixed acid (HNO3 HCl = 1 3).
3.2 Aqueous ammonia (11).
3.3 hydrochloride (11).
3.4 acetic acid - ammonium acetate buffer solution. Weigh 250g ammonium acetate was dissolved in 500mL of water, 150mL of glacial acetic acid was added, filtered, diluted with water
Diluted to 1000mL, and mix, stored in the grinding jar.
3.5 Lead acetate solution (18g/L). Weigh 18g lead acetate, glacial acetic acid was added 15mL and 100mL of water, stirring to dissolve, filtered water
Diluted to 1000mL, and mix.
3.6 acetic acid - ammonium acetate washing solution. Pipette 40mL acetic acid - ammonium acetate buffer solution (3.4), dilute with water to 500mL, and mix.
3.7 filter pulp. quantitative filter paper torn into small pieces with water boiled paste.
3.8 methyl orange indicator solution (1g/L).
4 Sample
The specimen shall crush a particle size less than 500μm.
Step 5 Analysis
5.1 Sample
Weigh 0.20g sample, accurate to 0.0001g.
5.2 Determination of the number of
Independently measured twice and averaged.