Instrument Introduction

The SMWD5000 Super Microwave Digestion System boasts a miaximum operating temperature of 280℃， requires minimal acid usage, and offers high automation. It can be optionally equipped with a magnetic stirring system to facilitate the digestion reaction, which simplifies the digestion process.

1. Sample and Reagent

Samples: HfO₂, Ta₂O₅, TiO₂, ZrO₂

Solid power reagents: HNO₃, HF, H₂SO₄, H₃PO₄, all of GR

2. Digestion Experiment

2.1 Digestin Solution for HfO₂, Ta₂O₅ and TiO₂ Samples

Weigh 0.1000g of HfO₂, Ta₂O₅ and TiO₂ samples into digestion tubes.

For TiO₂ sample, add 2mL of HNO₃ and 2 mL of HF; for the other samples, add 2 mL of HNO₃ and 1mL of HF.

Perform digestion according to the program outlined in Table 1.

Table 1  Digestion Program for HfO₂, Ta₂O₅ and TiO₂ Samples

2.2 Digestin Solution for ZrO₂ Sample

Weigh 0.1000g of ZrO₂ sample into a digestion tube.

Place a high-temperature resistant magnetic stirring bar into the digestion tube (without stirring, the sample weight should be less than 0.05g, and the digestion time at 260℃ should be over 60 min to achieve a clear, precipitate-free solution).

Add 2 mL of H₂SO₄, 2 mL of H₃PO₄, 1 mL of HF, and 2 mL of HNO₃.

Perform digestion according to the program outlined in Table 2.

Table 2                         Digestion Program for ZrO₂ Sample