Objective: To study the element spectra of six kinds of calcium mineral drugs

in order to establish a rapid and environmental friendly analytical method to identify the authenticity and quality of mineral drugs powder

including the similar composition samples. Method: In this experiment

samples of Gypsum Fibrosum

Stalactitum

Ophicalcitum

Fluoritum

Os Draconis and Spirifer were crushed to 200-mesh powder. Afterwards the samples were pressed into directly pellets

and determined by X-ray fluorescence standard-less quantitative analysis method. All of the samples were measured within the scope of elements from oxygen to uranium. A method for characterizing the spectral characteristics of mineral elements were established

with the square root of K

L

M line intensity as the vertical coordinate and 2θ angle as the horizontal coordinate. The matched element spectral line coordinates were drawn on the spectra

so as to visually identify the elemental characteristics of medicinal materials. Result: From the six kinds of calcium mineral drug

25 elements

namely Al

Ca

Er

F

Fe

Ga

K

Mg

Mn

Mo

Na

Nb

O

P

Rb

S

Ba

Si

Sr

Zr

Ti

W

Y

Zn and Re

were detected. The element spectra of the same kind calcium mineral drugs were relatively stable

the element spectra of different medicinal materials were obviously different. Among them

the content of Ca

F

O

P

S

Si varied widely

with small changes in Al

Er

Fe

Ga

K

Mo. The content of three Gypsum Fibrosum samples and one Fluoritum sample did not meet the requirement of 2015 edition Chinese Pharmacopoeia. Conclusion: Compared with other methods

X-ray fluorescence spectrometry has the advantages of simple operation

simultaneous analysis of multi-elements and environmental friendliness. It can quickly and easily obtain the elements spectra information of mineral drugs and identify the homogeneity of mineral drug powder.