Compared with traditional low-pressure liquid chromatography (LPLC), which advantages are typically associated with HPLC systems?

Introduction / Context:
HPLC modernized liquid chromatography by adding high-pressure pumping, smaller particles, precise detectors, temperature control, and autosamplers. These upgrades expand application range and improve data quality versus traditional low-pressure setups.

Given Data / Assumptions:

• HPLC uses tightly packed, small-particle columns that increase efficiency.
• Detectors (UV/Vis, fluorescence, MS) provide high sensitivity.
• Specialty modes (ion-exchange, ion-pair, SEC) handle ionic species and large biomolecules.

Concept / Approach:
Higher efficiency yields narrower peaks and better resolution, enhancing sensitivity. Columns are reusable with proper conditioning. Modes like ion-exchange and SEC, along with biocompatible hardware and volatile buffers, improve sample recovery for proteins and polymers.

Step-by-Step Solution:
Assess each option against HPLC capabilities.Confirm that sensitivity, reusability, and applicability to ionic/large analytes are legitimate benefits.Select the comprehensive choice covering all points.

Verification / Alternative check:
Vendor application notes demonstrate sub-ppm detection and robust column lifetimes across modes, with validated recoveries in bioanalytical methods.

Why Other Options Are Wrong:

• (a), (b), (c) are each true but incomplete; (d) captures the full advantage set posed in the question.

Common Pitfalls:
Assuming all HPLC modes suit every macromolecule; shear or adsorption can reduce recovery without appropriate column and mobile-phase selection.

Final Answer:
All of the above