Supplement; Recommended Combinations Of Shaking Flasks An Grinding Balls; Basic Analysis Of Materials For Shaking Flasks And Grinding Balls; Materials And Characteristics - Sartorius Stedim Biotech Mikro-Dismembrator S Mode D'emploi

6

Supplement

6.1

Recommended Combinations of Shaking Flasks an Grinding Balls

Shaking flasks
Grinding balls
PTFE with steel core
quartz agate
Chromium steel
Tungsten carbide
= optimum combination
6.2

Basic Analysis of Materials for Shaking Flasks and Grinding Balls

6.2.1 Materials and Characteristics

Material
PTFE
stainless steel
Chromium steel
Tungsten carbide
quartz agate
Stainless steel
--
= possible combination
Chemical composition, special notes
high purity PTFE, very low resistant to abrasion;
suitable for trace element analysis; not recommended for abrasive
samples
steel classific. 1.4301; corrosion resistant, X5CrNi 1810 (acc. to DIN
17440), medium resistant to abrasion;
composition: Fe = 68%, C = 0.07%, Si = 1.0%, Mn = 2.0%, Cr = 17-
20%, Ni = 8.5-10%
specific weight 7.85 g/ cm
composition: Fe = 86%, C = 1.5%, Cr = 12%, trace ingredients of W, Mo
or V
Specific weight 14.75 g/cm
resistant to abrasion;
composition:
C = 5.7 – 5.8%, Co = 5.6 - 6%, Ti+Ta = 0.7 - 1%, Fe < 0.1%
Brazilian agate of spec. weight: 2,6 g/cm
ray fluorescent assays and trace element analysis;
highly resistant to abrasion;
composition:
SiO = 99.91%, Al O = 0.02%, Na
2 2 3
K O = 0.01%, MnO = 0.01%, CaO = 0.01%, MgO = 0.01%
2
PTFE
3
, medium resistant to abrasion;
3
, well suited for abrasive samples; high
3
, well suitet for IR-, UR, and X-
O = 0.02%, Fe 0 = 0.01%,
2 2 3
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