ISO 6918:1984 PDF
Crude sodium borates for industrial use — Determination of total and alkali-soluble calcium and magnesium contents — Flame atomic absorption spectrometric method
Crude sodium borates for industrial use — Determination of total and alkali-soluble calcium and magnesium contents — Flame atomic absorption spectrometric method
- Статус документа:
- Отменён
- Формат:
- Электронный (PDF)
- Количество страниц:
- 4
- Дата публикации:
- 1 ноября 1984 г.
- Издание:
- ISO IS 6918 edition 1 version 1
- ICS:
- 71.060.50
A test solution is prepared by one of the two following ways: a) fusion of a test portion with sodium carbonate in the case of total calcium and magnesium contents, and b) from an aliquot portion of "solution A" (ISO 2217) for alkali-soluble calcium and magnesium contents. Lanthanum ions are added to the solution to suppress certain interferences. The solution is aspirated into an acetylene/dinitrogen monoxide flame and the measurement are carried out at a wavelength of 422.7 nm (calcium line) and of 285.2 nm (magnesium line).
Технические детали
- Технический комитет
- ISO/TC 47 - Chemistry
- SKU
- ISO 6918:1984