Objectives

The primary objective is to procure two Rabbit IL-4 ELISA Kits for Onderstepoort Biological Products Ltd. The tender aligns with South African public procurement frameworks, prioritising cost-effectiveness (80% weighting) while supporting socio-economic transformation through preferential procurement points (20% weighting) for historically disadvantaged groups.

Scope

The scope encompasses the supply, packaging, and delivery of two complete ELISA kits. Suppliers must ensure uninterrupted cold-chain logistics from dispatch to final delivery. All bids must comply with government procurement conditions, be submitted via the official supply chain portal, and include mandatory compliance documentation, including a Certificate of Analysis (COA) and completed Standard Bid Document (SBD) forms. Failure to submit any compulsory declaration results in immediate disqualification.

Technical Requirements

• Micro ELISA plate pre-coated with antibodies specific to Rabbit Interleukin-4 (IL-4).
• Sandwich immunoassay methodology requiring sequential incubation with standards/samples, a biotinylated detection antibody, and an Avidin-Horseradish Peroxidase (HRP) conjugate.
• Chromogenic detection using TMB substrate, producing a colour change from blue to yellow upon acidic termination.
• Quantification via spectrophotometric measurement at 450 nm (±2 nm) against a freshly generated standard curve.
• Strict temperature-controlled transport (wet/dry ice) to preserve the stability of fragile antibodies, enzyme conjugates, and standard proteins.

Skills & Operational Requirements

While no explicit personnel certifications are mandated, suppliers must demonstrate operational capacity in scientific reagent distribution, validated cold-chain management, and strict adherence to South African regulatory compliance. This includes proficiency in navigating the government procurement portal, preparing accurate financial quotations, and submitting verified BBBEE documentation, SBD declarations, and product certificates of analysis without omission. Bidders must also possess the administrative capability to complete mandatory disclosure forms regarding state employment, related enterprise interests, and anti-collusion commitments.

Key Terms & Definitions

• ELISA Kit: Enzyme-Linked Immunosorbent Assay; a highly sensitive laboratory technique used to detect and quantify specific proteins. In this context, it measures IL-4, a critical immune signalling cytokine in rabbits.
• Cold Chain Logistics: Temperature-controlled supply chain management essential for preserving the biological activity and shelf-life of sensitive reagents during transit.
• BBBEE: Broad-Based Black Economic Empowerment; a South African policy framework that awards preference points based on ownership demographics (e.g., ≥51% black ownership, ≥30% women ownership, or verified disability status).
• SBD Forms: Standardised bid submission documents required by South African state entities to verify bidder eligibility, disclose conflicts of interest, and claim preferential procurement points.