偏钨酸铵

偏钨酸铵 （Ammonium Metatungstate Tungsten，AMT）
Grade AMT-1A AMT-2A
AMT-1B AMT-2B
AMT-1C AMT-2C
Purity Min.(%) 99.95 99.90
Main Comp WO3 MIN.(%) 83.0 83.0
Content of Other Chemical Element Max.(%) Al 0.001 0.001
As 0.001 0.001
Bi 0.0001 0.0001
Ca 0.001 0.003
Cr 0.001 0.001
Cu 0.001 0.003
Fe 0.002 0.003
K 0.0015 0.002
Mg 0.001 0.002
Mn 0.001 0.001
Mo 0.005 0.01
Na 0.0015 0.002
Ni 0.001 0.001
P 0.001 0.003
Pb 0.0001 0.0001
S 0.0005 0.001
Sb 0.001 0.002
Si 0.001 0.002
Sn 0.0001 0.0003
Ti 0.001 0.002
V 0.001 0.002
Matter Undissolved in Water Max 0.5 0.5
PH Value 3.0-4.5 3.0-4.5

Appearance:White crytallized powder or light yellow. ，不溶于水，这是和仲钨酸铵明显的区别之处