求翻译：称取试样0.5000克，置于铂金坩埚中，加浓硝酸5毫升，(1+1)硝酸5毫升，滴加氢氟酸至试样全溶，加(1+1)硫酸5毫升，加热蒸发至冒尽三氧化硫白烟，加焦硫酸钾3~4克，于600~700℃熔融，取出冷却。是什么意思？

Weigh 0.5000 g sample, placed in platinum crucible, add 5 ml concentrated nitric acid (1 +1) nitric acid 5 ml hydrofluoric acid was added dropwise to dissolve the whole sample, plus (1 +1) sulfuric acid 5 ml, heating evaporation of sulfur trioxide to take to make white smoke, add coke 3 to 4 grams o

That specimen 0.5000 grams, placed in platinum crucibles, add 5 ml concentrated nitric acid, nitric acid (1 + 1) 5 ml, drip plus hydrofluoric acid to the sample soluble, plus (1 + 1) sulfuric acid 5 ml, the heating evaporated to risk to do 3 white smoke, sulfur dioxide gaggio potassium sulfate 3~ 4

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Take 0.5000 g of the sample, place in a Platinum Crucible, add 5 ml of concentrated nitric acid, (1+1) nitric acid 5 ml, spot hydrofluoric acid to the sample solution, plus (1+1) sulfuric acid 5 ml, heating evaporation of sulfur trioxide to take white smoke, plus Coke 3~4 grams of potassium sulfate,

Weigh 0.5000 g sample, placed in platinum crucible, add 5 ml concentrated nitric acid (1 +1) nitric acid 5 ml hydrofluoric acid was added dropwise to dissolve the whole sample, plus (1 +1) sulfuric acid 5 ml, heating evaporation of sulfur trioxide to take to make white smoke, add coke 3 to 4 grams o