As the development and uprising of high-tech glass industry,the optical glass market sets a much stricter standard on the content of sodium in potassium nitrate.The content of sodium in potassium nitrate can be as low as 10 μg/g for optical glass.For trace sodium of such low content in potassium nitrate,an extremely strict measurement conditions are needed.Using atomic absorption spectrophotometer,the proper measurement conditions for determining trace sodium(about 10 μg/g) in potassium nitrate for optical ...