Indian Council of Agricultural Research
(Agricultural Knowledge Management Information System)

ICAR-Indian Institute of Soil Science, Nabi Bagh, Berasia Road, Bhopal-462038 Madhya Pradesh (
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Instrument Details
Instrument/Facility Name: Atomic Absorption Spectrophotometer (AAS)
Make                                   : M/s Varian /Agilent Technologies,
Model                                  : AA240FS/AA240Z
Specification   :Atomic Absorption Spectrophotometer for cationic micronutrient and heavy metal analysis in soil, plant and water samples

Click to ViewAAS 240FS and 2240 Z Systems have been specially designed simultaneous analysis of for micronutrients and heavy metals in processed samples. There are analytical methods for simultaneous analysis of micronutrients as like, (Fe, Mn, Cu, and Zn) and heavy metals (Pb, Cr, Ni and Co). Each system has its own features to meet different requirements of micronutrients and heavy metals analyses. Results from both the instruments demonstrated high sensitivity and excellent repeatability for the required analyses.

  Working Principles
Click to ViewThe Atomic Absorption Spectrophotometer is true optically double beam with permanently aligned dual atomizer having capability to use both flame and furnace mode of operation simultaneously. The system is provided D2 background correction from flame AAS and Zeeman background correction for furnace system. Working on the principles of solvent extraction, it is possible to carry out speciation studies on aqueous samples. The relative oxidation states of redox pairs can be determined in the sample by selectively extracting one oxidation state by a judicious choice of the chelating agent. The total metal can be determined by ensuring all the metal is either oxidized or reduced to the one extractable form or if present in sufficient quantity determined directly without sample treatment. The maximum absorbance (MAX. ABS) is the maximum peak height Zeeman absorbance which can be used for the wavelength specified for the element, using a time constant of 0.05 seconds. All analytical measurements must be below this maximum peak absorbance. An error message will appear if the peak analytical signal (including blank signal) is greater than the maximum absorbance stored for the particular element. Note that when peak area mode is used, it is the peak height absorbance which is governed by the MAX ABS limit. If a time constant greater than 0.05 seconds or if another analytical wavelength is employed the maximum absorbance applicable to these conditions must be determined before proceeding.

  User Instructions
AAS 240FS and 2240 Z Systems have been devolved for analysis of cationic micronutrients and heavy metals in soil, plant and water samples.The users are advised to analysis processed samples immediately after collection and processing of samples collected from the field.

  Contact Us
Contact No. 0755-2730970
Email Id

  Atomic Absorption Spectrophotometer (AAS) Charges
Procedure Name
National LAB/R&D
Micronutrient and heavy metal analysis
Tentative cost/sample for Zn, Cu, Fe and Mn or selected heavy metals

Additional Rs 100/-towards postal charges if result are to be posted
The Demand Draft should be in favour of "Director, ICAR-IISS, Bhopal"
Letter, DD & Samples send to "Director, IISS Nabibagh, Berasia Road, Bhopal - 462038 Madhya Pradesh, India. Phone (Off.) - 0755-2730946 Fax- 0755-2733310"