| K2O_pct_AA_FE |
Potassium, as potassium oxide, in weight percent, by flame emission spectroscopy after multi-acid digestion with HF, or after LiBO2-Li2B4O7 fusion |
| K2O_pct_AA_F_Fuse |
Potassium, as potassium oxide, in weight percent, by flame-atomic absorption spectrophotometry after LiBO2-Li2B4O7 fusion |
| K2O_pct_AA_F_HF |
Potassium, as potassium oxide, in weight percent, by flame-atomic absorption spectrophotometry after multi-acid digestion with HF |
| K2O_pct_AES_AR_P |
Potassium, as potassium oxide, in weight percent, by inductively coupled plasma-atomic emission spectroscopy after partial digestion with aqua regia |
| K2O_pct_AES_Fuse |
Potassium, as potassium oxide, in weight percent, by inductively coupled plasma-atomic emission spectroscopy after LiBO2 or LiBO2-Li2B4O7 fusion |
| K2O_pct_AES_HF |
Potassium, as potassium oxide, in weight percent, by inductively coupled plasma-atomic emission spectroscopy after HF-HCl-HNO3-HClO4 digestion |
| K2O_pct_AES_ST |
Potassium, as potassium oxide, in weight percent, by inductively coupled plasma-atomic emission spectroscopy after Na2O2 sinter digestion |
| K2O_pct_ES_Q |
Potassium, as potassium oxide, in weight percent, by quantitative direct-current arc emission spectrography |
| K2O_pct_ES_SQ |
Potassium, as potassium oxide, in weight percent, by semi-quantitative visual 6-step or direct reader direct-current arc emission spectrography |
| K2O_pct_MS_HF |
Potassium, as potassium oxide, in weight percent, by inductively coupled plasma-mass spectroscopy after HF-HCl-HNO3-HClO4 digestion |
| K2O_pct_NA |
Potassium, as potassium oxide, in weight percent, by neutron activation |
| K2O_pct_WDX_Fuse |
Potassium, as potassium oxide, in weight percent, by wavelength-dispersive X-ray fluorescence spectroscopy after LiBO2 or LiBO2-Li2B4O7 fusion |
