The H-point and generalized H-point standard additions methods for flow injection procedures

Area of Science:

• Analytical Chemistry
• Spectroscopy
• Environmental Analysis

Background:

• Flow injection analysis (FIA) is a common technique for chemical analysis.
• Matrix effects and blank bias can complicate analyte determination in real-world samples.
• Accurate quantification of analytes like chloride, calcium, and magnesium is crucial for water quality assessment.

Purpose of the Study:

• To establish the fundamentals of the H-point standard additions method (HPSAM) and generalized HPSAM (GHPSAM) for flow injection analysis.
• To evaluate the performance of HPSAM and GHPSAM in determining single and multiple analytes under various challenging conditions.
• To assess the applicability of these methods for analyzing species in bottled water samples.

Main Methods:

• Utilized flow injection analysis (FIA) with HPSAM and GHPSAM.
• Employed analytical signals from FIA peaks and spectra.
• Investigated analyte determination with and without matrix effects and blank bias.
• Examined the determination of chloride and calcium/magnesium using specific reagents.

Main Results:

• HPSAM and GHPSAM successfully isolated analyte signals from global signals, even in the presence of matrix effects and blank bias.
• Accurate and precise results were obtained for the determination of chloride, calcium, and magnesium in bottled water.
• The methods demonstrated effectiveness in handling complex analytical problems, including multi-analyte determinations.

Conclusions:

• HPSAM and GHPSAM are robust and effective methods for quantitative analysis in flow injection systems.
• These methods provide accurate and precise results without requiring additional experimental work.
• The developed techniques offer a reliable solution for analyzing target species in complex matrices like bottled water.