The second lab managers’ meeting of the South-East Asia Laboratory NETwork (SEALNET) took place on 19 - 23 November 2018 in ICAR-IISS (Indian Institute of Soil Science), Bhopal, India. Mr. Sun Sarak, National Agriculture Laboratory, Cambodia (2nd Day)

1. Internal quality control
National Analysis Laboratory(NAL)
Phnom Penh City
Ministry of Agriculture forestry and
Fisheries(MAFF), General
Directorate of Agriculture(GDA)

2. Do you have and use an internal quality control
system
YES
Control simples by location
YES
If yes, how often to you use your internal
quality control system?
Control chart

3. What are the characteristics of the material
used for quality control (QC)?
What kind of material is used to perform the quality control?
- natural soils? NO
- synthetic material? NO
- chemicals? YES
Is the material used for QC:
- prepared by yourself ? YES
- prepared out of the laboratory ? NO
- bought to a company as a certified reference material ?
YES

4. Analysis of the control material
Are you using the control material for all your analytical parameters? YES
If 'NO' are you using it for:
- pH YES
- EC YES
- Carbon YES
- etc. (please make the list of the top ten analysis according to on line
survey) YES
How often do you analyze your control material?
- in every analytical batch YES
- every hours /NO
- once a day YES
- once a week YES
- once a month YES

5. Comparison of control material results to
specific statistical limits
Do you have a data base where the control material results are collected?
YES
Are you using quality charts to plot your results (like in the figure attached this
email)? YES
Can you show an example of quality control chart obtained in your laboratory?
YES
How do you determine the specific statistical limits for acceptable/rejection
limits? Please describe it shortly or provide the statistical test

6. Action after a negative results for quality
control
If the quality control procedure indicates a failure (results out the statistical
limits), what do you do?
We need to redo and check he/ she procedure or chemicals regent,

7. Staff qualification
Is there a quality control officer to look into the quality of the results?
yes
If YES, did she/he get some special training to do this control?
yes
If YES, please provide some short information on the type of training she/he received
Two people are MSc Soil science in Russia
Four people are diploma on chemical and lab management in Germen
One is three months training on soil diagnosis and lab management in Japan.
Does she/he continue to be trained on a regular basis?
NO
If YES, please provide information on the frequency and duration of the training

8. Examples coming from your lab
Please, provide an example of variability
you have observed in your internal quality
control.
Or provide any examples that would help
the other participants to understand your
QC procedures.

9. Thanks for your attention

10. Thanks for your attention