Sample preparation for PIXE analysisSample preparation for PIXE analysis

K. Sera and S. MuraoK. Sera and S. Murao

How to collect hairs

・Cut more than 10 hairs at the portion close to the roots.

Grasp tightly as the root side can be defined

How to prepare hair samples

Root side

How to wash hair samples

Fully damp the clean gauze with acetone (or ethanol)

Wipe well the hairs with a damped gauze.This procedure should be repeated a few times.

How to wash hair samples-2

How to prepare a Target

Stick the root-side of the hair on the holder with an adhesive tape first, and then fix the other side so that hairs don’t overlap each other. Morethan eight hairs should be used if possible.

The total width of the fixed hairs should be within 6 mm. (within the beam diameter)

6 mm

Bad example

Adhesion tape is irradiated with the beam

X-rays

In the case of short hairs

root side

BeamAdhesion tape

Short hairs

within 5mm

No.6-female-32

No.9-male-48Normal controlHang the short hairs from the upper side of

the holder with an adhesive tape.

The adhesive tape should not be irradiated with the beam.

Elemental concentrations in hair for each nation

0.1

1

10

100

1000

10000

100000

Na Mg Al Si P S Cl K Ca Ti V Cr Mn Fe Ni Cu Zn As Se Br Rb Sr Nb Mo Hg Pb

Elements

Con

cent

ratio

n in

ppm

Bangladesh-1 Bangladesh-2

China-Arsenic Kazakhstan

Thailand Philippines

Mongolia China-fluorine

Japan

Elemental concentration in hairs depends strongly on the nations and the races.

Preparation of Urine samples

Take the urine sample of 5 μl with a micro-pipette.

Preparation of Urine samples-2

Put the 5μl of urine sample on the backing film stuck on the target holder.

Dry it in a clean atmosphere.

Preparation of water samples

Put more than 5cc of the waters sample into the perfectly sealed vessel. Keep it in a cold storage before transportation so as not to rot.

Preparation of farm products

Wash the sample with a water and remove soils and other impurities, and dry it. The amount of the sample should be more than 50 mg after drying.

Preparation of soils, sediments and tailings

Put a sample through a sieve and make the particle size uniform in your own way.

Preparation of soil samples

Put the sample of more than 500 mg into a shielded plastic bag.

3D-PET with CT

Common utilization of NMCC is now discontinued until the next April.

Announcement from NMCC