Ing chemist

Hi dafinamarku,

In order for our LabWrench team and members to better assist you, please specify the make and model of the equipment that you are referring to.

Best Regards,
Kylie

Hi Kylie! Thanx for your answer.The equipment is AAS Atomic Absorption Spectometer 400 PerkinElmer.During the work it appears this kind of problem .Detector saturation.data may not be valid,when i do this element copper and silver.I checked the standart and the blank there is no problem with them,we have 2 years working with HCL lamps for 3-4 hours a day,i don't know where the problem could be .

Best Regards,

     Dafina

Hello Dafinamarku,

You are only receiving this error message on some samples, not the standards or blank, correct? Then your sample may have some sort of contaminate or element in it that is producing a background emission near the wavelengths where copper and silver are measured and causing the detector to see more counts than it can measure. Try specifying a smaller slit size in your method to reduce the background emissions.

Hi ! Thank's for your information but i still have problem in the blank and standard to

Try lowering the current you're using on the lamp a few milliamps.

Hi!

A week ago I changed the weavlangth of lamp for cupper. It was 324.5 and I did 327.8. But now I con't use the lamp wich I have used before. I worked with the lamp HCL-(Cu,Zn.Fe.Mn), 25 Am ,but I can't use anymore.So I started to use a new lamp HCL-(Co.Cr.Cu,Mn,Ni)  30 Am and it works very well,but when i start to work with the lamps i have problem in the beginning of the work.After i activate lamps for copper and also have chosen the method for copper and energy lamp is OK (67-70) 20 seconds later start i with the analysis of blank but the program it stoped for while approximatly 3-4 minits,the lamp it start from the beginning to take the energy.( during those minits  the computer it shows this( Step: Setting up spectrometer). 5 minits later it start the work normaly. I dont know if this is normal or not?

Best Regards.

When you start a method the instrument is going to automatically reset the spectrometer and perform an AGC on the lamp. This can take some time.

Hi!

I want to change a method in AAS but i don't know all the steps to change it,also  i want to delete some methods wich have been installed before but i couldn't change it because i don't know how.Could you please tell me all the steps how to install a method and also how can i delete it. Thank you very much for your help.

Best Regards.

Dafina

Hello Dafina,

To create a new method click on File > New... > Method in the winlab32 software. Select the element you want to test for and the default parameters for testing that element will automatically be loaded into the method. You can then make edits to the method and save it by clicking File > Save > Method.

Deleting methods is performed through the data manager utility. Access it by clicking File > Utilities > Data Manger in the Winlab32 software or through the link in the Windows Start Menu Winlba32 for AAS program group. Either way Data Manager opens as a separate window and by default the results database is displayed. Click File > Select Library Category and select methods to open the Methods database instead. From there you can delete methods by highlighting them and clicking the delete button on the toolbar.

No lamp is ok, same thing happens to me but perkin elmer services engineer only saying that you have to change the nebuliser? i am getting 0.004 absorbance on 2ppm standard copper nebuliser and 0.009 absorbance on 4ppm standard copper that is wrong. recommendation is that 2ppm copper must show absorbance around 0.2 or above similarly, 4ppm must show absorbance from 0.380 to 0.430......... I am trying to change the nebuliser let see what happens next