珠光云母
The following merchandise was submitted and identifien
by the client as：
Type of product: MICA POWDER
Manufacturer / Vendor: TAIWAN DAH HER MINING CHEMISTRY CO.,LTD.
Test Required: 1） Chemical analysis and Physical Properties.
2） He***y metal contents of submitted sericite powder.
3） Bacteriological test.
Test Method: 1）The powder was digested in concent cated nitric acid.
Analysis by atomic adsorption techniques.
2) Total Plate Count-US FDA Bacteriological Analytical manual 6TH
Edition, 1984. Chapter 1 and chapter 4.
Test Results：
1) Chemical analysis and Physical Properties
Whitenss (白度) 92 %GE
Bulk Density (容积比重) 0.40 g/cm3
Specific Gr***ity (原矿比重) 2.6 g/cm3
Loss on Ignition (烧热减量) 2.00
Particle Size (平均粒径) 5 μm
Silicon Dioxide (二氧化硅) 50.5 %
Aluminum oxide (三氧化二铝) 33.6 %
Potassium oxide (氧化钾) 11.2 %
Magnesium oxide (氧化镁) 1.53 %
Ferric oxide (三氧化二铁) 0.15 %
2) He***y metal (***)
Lead (铅)┄┄┄┄┄┄┄┄┄┄┄┄┄ Less than 3 ppm
Antimony (锑)┄┄┄┄┄┄┄┄┄┄┄┄┄ Less than 1 ppm
Arsenic (***)┄┄┄┄┄┄┄┄┄┄┄┄┄ Less than 3 ppm
Barium (钡)┄┄┄┄┄┄┄┄┄ Did Not impart Green color
Cadmium (镉)┄┄┄┄┄┄┄┄┄┄┄┄┄ Less than 1 ppm
Chromium (铬)┄┄┄┄┄┄┄┄┄┄┄┄┄ Less than 1 ppm
Mercury (***)┄┄┄┄┄┄┄┄┄┄┄┄┄ Less than 1 ppm
Iron (铁)┄┄┄┄┄┄┄┄┄┄┄┄┄┈┈┈ 0.2 %
PPm = Parts Per million ( mg / kg )
3) Bacteriological test
Total Plate Count --------------------- 40/gm