EDXRF - Calibration

Guideline for students

The most important task that need to be completed in sample measurement is calibration of the instrument. without the calibration, the quantitative analysis can't be done and to do that, we need to get the calibration graph and their equation. this is the manual technique for carried out the calibration of the instrument. below is a technical note of standard calibration of EDXRF.

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when do the calibration, student need to do some background study about EDXRF and literature review. Further literature review about the condition of the samples, energy line measure, measured line ( K, L, M), sample preparation and others will help student more understand.

EDXRF - Periodic Table and Peak Identification

This is the Periodic Table and Peak Identification for EDXRF. It include the type of filter recommended for each element in XRF measurement and also the energy line measured for the elements. The Peak Identification is to identify the energy peak of element in the spectrum.

(to download - right click at [Download] and save as).

preview

The Periodic Table of The Elements [Download]

Peak Identification Chart [Download]

post by,

Mr Admin

General Laboratory Practice and Regulation

Here is some general practice and regulation for Blok G4 Lab. All student need to read and follow the rules given.

General

1. Bring only the necessary things in.
2. In the lab you must wear a labcoat but especially during working with instruments and chemicals. without labcoat, student are prohibit from using/conducting the instrument.
3. wear gloves when handling samples and chemicals.
4. If you wear gloves, never touch doorhandles, equipment, keyboards, computers, lightswitches etc with the gloved hand. If you don't trust it is "clean", then use a clean tissue to touch it.
5. It is strictly prohibited to eat, drink or smoke in the lab.
6. It is prohibited to write or stick comments on the lab equipment without permission.
7. It is prohibited to take chemicals, reagent without permission

Safety

1. Always read instructions on the chemicals and reagents first before using them. In case of doubt consult the labtechnician.
2. Dispose chemical/biological waste in appropraite containers
3. Special attention must be given to hazardous chemicals/reagents.
4. Wash your hands before you leave the lab.

Cleaning

1. Keep the lab tidy. Everyone has to clean lab table before leaving.
2. Everyone who used the facillities of the lab that month must help to clean it.
3. Cleaning of glassware after used
4. In case of little spilling, clean area with tissues
5. Cleaning of spilles chemicals (especially near the balances):
   Always clean spilled chemicals immediately. In case of spilling hazardous chemicals, mark but avoid the contaminated area and contact the labtechnician.

Machines

1. When you use a machine and you are not familiar with it, read the equipment instructions carefully and ask person in-charge.
2. When you want to use the on your own, you need permission from person in-charge.
3. It is not allowed to install any software on the instrument computer.
4. To save your data, please used blank CD/DVD instead of USB storage to avoid virus spread on the computer.

more will be added later if necessary..

TQ,

Mr Admin

EDXRF - student reminder

Attention to all students,

Before used EDXRF, all student must attend the training course conducted by person in-charge and will be made in group. Student who missed the training course will not be allowed to use the instrument. There is No Excuse for the time of the training course. This is to make sure all the students follow-up the training.

To book EDXRF for the measurement, please contact person in-charge to add your name in the Online Schedule one week advance before the date. Before that, please check at the Online Schedule for the availability of the day you want to use it. The Information that needs to be submitted to the person in-charge is:

1. Name
2. ID
3. Program
4. H/P no.
5. Main Supervisor name
6. sample type
7. Date and time

The date and time need to be discuss with the Person In-charge and can be change without prior of notice.

The Online Schedule can be view at http://radiokimia.blogspot.com/p/schedule.html

Every week, one person in-charge will take over and will always change every week. In order for the EDXRF to operate, the person in-charge needs to be present for safety and monitoring reason. Current person in-charge:

1. Miss Linda
2. Mr Najif
3. Mr Admin

TQ,

Mr. Admin

Software

To download the software, please right click at [Download] and save as.

1. Gamma Spectrometry software

GammaVision V6.07

[Download]

2. EDXRF software

• For MiniPal software, Download All Part for complete software.

MiniPal Software

Part 1 [Download]

Part 2 [Download]

Part 3 [Download]

Part 4 [Download]

3. Mapping software

Surfer-8

[Download]

4. statistic_analysis_software

XLSTAT_PRO
[Download]

Gamma Peaks U and Th

Preview

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EDXRF Principle

(Source figure)

Figure 1 show the principle of XRF, An inner shell electron is excited by an incident photon in the X-ray region. During the De-excitation process, an electron is moving from a higher energy level to fill the vacancy created by ab ejection. the energy difference between the two shells appears as an X-ray emitted by the atom. the energy of the peaks lead to the identification of the elements present in the sample (qualitative analysis), while the peak intensity provides the relevant or absolute elemental concentration (semi quantitative/quantitative analysis).

Type of radiation and their penetrating powers

(Source: Radiation Emergency Medicine Information network, REMnet)

Sources of Radiation

(Source: World Nuclear Association, WNA)

U-235, U-238 and Th-232 Decay Series

(Source: World Nuclear Association, WNA)

Soil Map Peninsular Malaysia

To get better view of this map, download the map

(right click and save as)

[Download]

Nuclear Periodic Table

(click to enlarge)

Environmental Study

In this research, we focus our finding on:

1. Natural Radionuclides in environment

2. Heavy Metals in environment

3. Water Quality

There are also guideline for student undergoing the research method for better understanding about the theory of the measurement. Understanding the theory will help us know the important part of the research.