Revised Specifications of (1) Atomic Absorption Spectrophotometer and (2) LC-MS-MS Spectroscopy: 
 

1.  ATOMIC ABSORPTION SPECTROPHOTOMETER: 
 

1. Optically double beam with permanently aligned dual atomizers having capability to switch over from flame to furnace mode through software. 
2. D2 background correction for flame part and Zeeman background correction for furnace system. Provision for analysis of elements in a sample in a single measurement.
3. The instrument should have fully sealed quartz quoted optics with a good quality of Monochromator (either of Czerny Turner mounting or other) with focal length of at least 250 mm having Holographic/Echelle blazed diffraction grating with line density of 1200 lines /mm or more, wave length range: 185 – 900nm. Computer controlled adjustments of spectral bandwidth in steps. Automatic lamp selection.  
4. The lamps should be coded with life periods of at least 5000 mA. The slit selection should be automatic. The instruments should have either solid state or P.M.T Detector.
5. The system should have premix – type corrosion resistant nebulizer with impact bead assembly and cyclonic spray chamber and can take up solution with high dissolved solid (2%) intake of HF/acid/alkali/aqueous/organic solvent. It should have automatic gas control system. Sensitivity of the instrument for flame operation should not be less than 0.9 Abs for 5ppm Cu with <0.5% RSD using 5-seconds integration time.
6. Analysis of Se, Cd, Pd, As, Cu, Fe, Mn, Sn, Zn in tissue, serum, plasma and in organic/inorganic molecule.
7. Analysis in ppm and ppb level.
8. The combined system should have fully computer-controlled graphite Atomizer with an arrangement of uniform temp profile over the entire tube. It should have transversed electronically modulated AC Zeeman effect background corrector having a peak field on strength not less than 0.8 Tesla during read period.
9. Zeeman background correction is required over the wave length range form 185-900 nm. The system should be provided with water cooling devices. Temperature should be programmable. Graphite tube must be pyrolytically coated, enclosing in an inert gas atmosphere by one-piece graphite shroud. Supplies must provide substantial number of such tubes free of charge, including wall atomization tubes plus platform for platform atomization. Auto Sampler for Zeeman graphite furnace should have capacity of holding at least 50 samples at a time in 2ml vials should be quoted.
10. Microwave digester with LCD display, auto temperature and pressure control, capability to digest minimum 10 samples at a time.
11. Safety system: There should be adequate safety measurement such as separate ignite/flame-off buttons, internal gas connections made automatically, flame shields and    protection against heat and UV radiation. External adjustment of all burner and spray chamber controls. Violation of any safety interlock should prevent flame ignition or     should extinguish existing flame.
12. The software should be windows XP based multitasking with a provision of calibration, recalibration, data storage, data manipulation, reslope, post data run, display of recommended condition, graphs, curves, absorption peaks, background correction inter elemental correction including fault / error finding diagnostic features, statistical parameters and all necessary features.
13. The computer should be Pentium-4 based, with latest configuration having laser/DeskJet color printer and 17” color monitor.
14. Coded Hollow Cathode Lamps for the above elements.
15. Continuous flow Hydride/Vapour Generation Assembly for analysis of hydride forming elements.
16. Pre-installation requisites and accessories should be quoted.
17. UPS/Voltage Stabilizer needed for the Instrument should be quoted.
18. The system should have 5 year Comprehensive warranty.
19. Kolkata based after sale service and users list of similar products.

2. LC/MS/MS SPECTROSCOPY: 
 

1. The system should be capable of measuring food toxins, pesticide residue, drug antibiotics, neurotransmitter from biological samples, environmental hazardous samples, synthetic organic molecules and organo metallic compounds of natural products.
2. The system source should have ESI and APCI with +ve and –ve polarity switching with time span as minimum as possible, having programmable automatic switching arrangement from ESI to APCI in a single run. Cleaning the source without venting the system.

1. ESI should handle flow rate from 5- 1,000 ľl/min or better.
2. APCI should handle flow rate from 200-2000 ľl/min

3. The system should have following sensitivity performance specifications:

1. ESI Positive Ion Sensitivity,
2. The sig