In order to implement the environmental protection law of the people's Republic of China, protect the ecological environment, protect human health, improve the level of ecological environment management, and standardize the monitoring work of ecological environment, the Ministry of ecological environment recently issued the national environmental protection standard of "wavelength dispersive X-ray fluorescence spectrometry for the determination of inorganic elements in solid waste (Draft for comments)". It is the first time to issue a wavelength dispersive X-ray fluorescence spectrometric method for the determination of 16 inorganic elements and 7 oxides in solid wastes such as sludge, polluted soil, fly ash, tailings and smelting slag. 16 inorganic elements and 7 oxides include as, Ba, Cl, Co, Cr, Cu, Mn, Ni, P, Pb, s, Sr, Ti, V, Zn, Zr, SiO2, Al2O3, Fe2O3, and O2 Potassium (K2O), sodium oxide (Na2O), calcium oxide (CAO), magnesium oxide (MgO). This standard can be used to prepare solid waste samples by the method of molten glass flake or powder pressing. The method of molten glass flake is applicable to the preparation of solid waste samples such as sludge, polluted soil, fly ash, tailings waste rock and smelting slag, while the method of powder pressing flake is only applicable to the preparation of solid waste samples such as sludge, polluted soil and fly ash. The detection limit of 16 inorganic elements in solid waste is 5mg / kg ~ 70mg / kg and the detection limit is 20mg / kg ~ 280mg / kg. The detection limit of 7 oxides is 0.01% ~ 0.03% and the detection limit is 0.04% ~ 0.012%. The detection limit of 16 inorganic elements in solid waste is 2mg / kg ~ 30mg / kg and the detection limit is 8mg / kg ~ 120mg / kg. The detection limit of 7 oxides is 0.04% ~ 0.012% It is 0.01% ~ 0.03%, and the lower limit is 0.04% ~ 0.012%. See the following table for details:
Analytical methods for determination of elements and oxides -- detection limit and determination lower limit
Element or oxide
Molten glass flake method
Powder compression
Method detection limit (element mg / kg, oxide%)
Lower limit of determination (element mg / kg, oxide%)
Method detection limit (element mg / kg, oxide%)
Lower limit of determination (element mg / kg, oxide%)
As
Six
Twenty-four
Two
Eight
Ba
Fifty
Two hundred
Thirty
One hundred and twenty
Cl
/
/
Ten
Forty
Co
Ten
Forty
Two
Eight
Cr
Thirty
One hundred and twenty
Five
Twenty
Cu
Thirty
One hundred and twenty
Three
Twelve
Mn
Thirty
One hundred and twenty
Eight
Thirty-two
Ni
Ten
Forty
Two
Eight
P
Twenty
Eighty
Nine
Thirty-six
Pb
Thirty
One hundred and twenty
Three
Twelve
S
Seventy
Two hundred and eighty
Ten
Forty
Sr
Six
Twenty-four
Two
Eight
Ti
Sixty
Two hundred and forty
Twenty
Eighty
V
Twenty
Eighty
Six
Twenty-four
Zn
Seven
Twenty-eight
Three
Twelve
Zr
Five
Twenty
Three
Twelve
SiO2
Zero point zero three
Zero point one two
Zero point zero three
Zero point one two
Al2O3
Zero point zero two
Zero point zero eight
Zero point zero one
Zero point zero four
Fe2O3
Zero point zero two
Zero point zero eight
Zero point zero one
Zero point zero four
K2O
Zero point zero two
Zero point zero eight
Zero point zero two
Zero point zero eight
Na2O
Zero point zero three
Zero point one two
Zero point zero two
Zero point zero eight
CaO
Zero point zero one
Zero point zero four
Zero point zero one
Zero point zero four
MgO
Zero point zero two
Zero point zero eight
Zero point zero one
Zero point zero four
Let me know you're looking
Click "read original" below to view the draft