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

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 alpha- 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.

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 °C precipitate, weighing as oxides.

3 Reagents

3.1 sulfate (rho1.84g/mL), pure class distinctions.

3.2 hydrofluoric acid (rho1.15g/mL), pure class distinctions.

3.3 hydrochloric acid (rho1.19g/mL), pure class distinctions.

3.4 Ammonia (rho0.90g/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.

5 Step, Analysis