A non-extractive sequential injection method for determination of molybdenum.

Area of Science:

• Analytical Chemistry
• Spectrophotometry

Background:

• Molybdenum is an essential trace element, but its accurate determination in water is crucial.
• Existing methods for molybdenum detection can be complex or require extensive sample preparation.

Purpose of the Study:

• To develop a non-extractive sequential injection spectrophotometric method for molybdenum determination.
• To validate the method's performance and applicability to water samples.

Main Methods:

• Sequential injection analysis (SIA) coupled with spectrophotometry.
• Utilized the reaction of molybdenum's thiocyanate complex with a polymethine dye in a hydrochloric acid medium.

Main Results:

• Achieved a linear calibration range of 0.080–1.92 mg/L for molybdenum.
• Established a limit of detection (LOD) of 0.021 mg/L.
• Successfully applied the method to determine molybdenum in spiked drinking and mineral water.

Conclusions:

• The developed non-extractive SIA method offers a sensitive and efficient approach for molybdenum analysis.
• The method is suitable for routine monitoring of molybdenum in various water types.