YS/T 568.1-2008 English PDF

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YS/T 568.1-2008: Chemical analysis methods for zirconium oxide and hafnium oxide. Determination of zirconium oxide and hafnium total content. Mandelic acid gravimetric method
Status: Valid

YS/T 568.1: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
YS/T 568.1-2008	149	Add to Cart	2 days	Chemical analysis methods for zirconium oxide and hafnium oxide. Determination of zirconium oxide and hafnium total content. Mandelic acid gravimetric method	Valid
YS/T 568.1-2006	199	Add to Cart	2 days	Zirconium and hafnium oxides--Determination of zirconium(hafnium)oxide contents--Mandelic acid gravimetric method	Obsolete

Similar standards

YS/T 656   GB/T 4325.5   GB/T 3458   YS/T 568.13   YS/T 568.3   YS/T 568.10   

Basic data

Standard ID: YS/T 568.1-2008 (YS/T568.1-2008)
Description (Translated English): Chemical analysis methods for zirconium oxide and hafnium oxide. Determination of zirconium oxide and hafnium total content. Mandelic acid gravimetric method
Sector / Industry: Nonferrous Metallurgy Industry Standard (Recommended)
Classification of Chinese Standard: H63
Classification of International Standard: 77.120.99
Word Count Estimation: 5,550
Date of Issue: 2008-03-12
Date of Implementation: 2008-09-01
Older Standard (superseded by this standard): YS/T 568.1-2006
Regulation (derived from): NDRC Notice No. 25 of 2008
Issuing agency(ies): National Development and Reform Commission
Summary: This standard specifies the hafnium oxide, zirconium oxide and zirconium oxide and hafnium oxide aggregate amount of determination. This standard applies to zirconium oxide and hafnium oxide, zirconium oxide and hafnium oxide aggregate content. Measuring range: 75% ~ 99%.

YS/T 568.1-2008: Chemical analysis methods for zirconium oxide and hafnium oxide. Determination of zirconium oxide and hafnium total content. Mandelic acid gravimetric method

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Chemical analysis methods for zirconium oxide and hafnium oxide.Determination of zirconium oxide and hafnium total content.Mandelic acid gravimetric method ICS 77.120.99 H63 People's Republic of China Nonferrous Metals Industry Standard Replacing YS/T 568.1-2006 Zirconium oxide, hafnium oxide chemical analysis Determination of zirconium oxide and hafnium oxide combined amount of Mandelic acid gravimetric method Posted 2008-03-12 2008-09-01 implementation National Development and Reform Commission issued

Foreword

YS/T 568 "zirconium, hafnium oxide chemical analysis method" is divided into 11 parts. --- Part 1. Determination of zirconium and hafnium oxide combined amount of mandelic acid gravimetric method; --- Part 2. Determination of iron content sulfonic acid spectrophotometry; --- Part 3. Determination of silicon content - Molybdenum blue spectrophotometric method; --- Part 4. Determination of aluminum content of chromium azure S- cylpyridinium chloride spectrophotometry; --- Part 5. Determination of sodium content by flame atomic absorption spectrometry; --- Part 6. Determination of the amount of titanium di Zhao DAM spectrophotometry; --- Part 7. Determination of phosphorus content of antimony salt - ascorbic acid - phosphorus molybdenum blue spectrophotometric method; --- Part 8. zirconia aluminum, calcium, magnesium, manganese, sodium, nickel, iron, titanium, zinc, molybdenum, vanadium, hafnium content - Inductively coupled plasma fat Emission spectrometry; --- Part 9. hafnium oxide of aluminum, calcium, magnesium, manganese, sodium, nickel, iron, titanium, zinc, molybdenum, vanadium, zirconium content - Inductively coupled plasma fat Emission spectrometry; --- Part 10. Determination of manganese content - Potassium periodate spectrophotometric method; --- Part 11. Determination of α- linked furoylhydrazone nickel dioxime spectrophotometric method. This is Part 1. The partial replacement of YS/T 568.1-2006 "zirconium oxide, hafnium oxide, zirconium oxide and hafnium combined amount of determination" (formerly GB/T 2590.1- 1981). This portion of YS/T 568.1-2006 compared to the main changes are as follows. --- Added "7.1 repeatability" clause; --- Added "8 Quality assurance and control" clause. The non-ferrous metal part by the National Standardization Technical Committee and centralized. This part by the Beijing Nonferrous Metal Research Institute, China Nonferrous Metals Industry Institute of Standards Metrology and Quality is responsible for drafting. This section was drafted by the Beijing Nonferrous Metal Research Institute. The main drafters of this section. Tong Ling, Li, Hu Zhenping. This part of the standard replaces the previous editions are. --- GB/T 2590.1-1981, YS/T 568.1-2006. Zirconium oxide, hafnium oxide chemical analysis Determination of zirconium oxide and hafnium oxide combined amount of Mandelic acid gravimetric method

1 Scope

This section provides zirconium oxide and hafnium oxide combined determination of the amount of zirconia and hafnium. This section applies to the determination of zirconium oxide and zirconium oxide and hafnium oxide combined amount of hafnium. Measuring range. 75% to 99%.

2 Method summary

In 2.4mol/L ~ 3mol hot hydrochloric acid/L was added so as to generate an acid bitter almond bitter almond insoluble zirconium, hafnium white flocculent Precipitation, aging into a crystalline precipitate. Calcined at 900 ℃ precipitate, weighing as oxides.

3 Reagents

3.1 sulfate (ρ1.84g/mL), pure class distinctions. 3.2 hydrofluoric acid (ρ1.15g/mL), pure class distinctions. 3.3 hydrochloric acid (ρ1.19g/mL), pure class distinctions. 3.4 Ammonia (ρ0.90g/mL). 3.5 phenolphthalein solution (10g/L). 3.6 mandelic acid solution (160g/L), filtered use. 3.7 washing solution. 25g mandelic acid was dissolved in 500mL of water, and add 10mL hydrochloric acid (3.3).

4 Instrument

Box-type high-temperature furnace and high pressure sample dissolution apparatus. Step 5 Analysis 5.1 Sample Weigh the sample 0.20g, accurate to 0.0001g. 5.2 Determination of the number of Independent of the two measurements, the mean value. 5.3 Determination 5.3.1 The sample (5.1) into a high pressure sample dissolution apparatus Teflon crucible added 3mL of hydrofluoric acid (3.2), cover the crucible lid, spin Tight high-pressure units, at 140 ℃ insulation 50min, until the sample is completely dissolved (eg sample soluble in hydrofluoric acid, can do high pressure sample dissolution means for Platinum dish can). After cooling, the crucible of the sample solution was transferred to 100mL water platinum dish, add 2mL of sulfuric acid (3.1), added to the furnace Thermal evaporation to take strong white smoke, remove the cooling water purge platinum dish wall heating was continued to take to make white smoke, remove the cooling. 5.3.2 added 10mL of hydrochloric acid (3.3) in the platinum dish, and heated to a platinum dish, dissolved after drying, transferred to 250mL beaker with water and dilute Diluted to 100mL. Add 3 drops of phenolphthalein solution (3.5), was added dropwise aqueous ammonia (3.4) until the solution turns red, the number of excess drops, heated to boiling, removed. 5.3.3 hot medium speed quantitative filter paper, and washed in hot water with ammonia micro beaker of pH8. The precipitate was washed 7 times again. The precipitate together Filter paper back into the original beaker, was added 25mL of hydrochloric acid (3.3), the precipitate was dissolved by heating and mashed filter, dilute with water to 100mL, heated to boiling, Remove. Mandelic acid solution was added 50mL (3.6) and continue heating to a boil, displacing the boiling water bath, heat 2h (without insulation on a boiling water bath, ......

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