Gold Starter Kits
Getting started with gold starter kits
Are you using gold for the first time, or trying a new process and are unsure of which size particle to purchase? Our gold starter packs allow a comprehensive evaluation, comprising 100ml and/or 20ml each of a selection of our gold nanoparticles.
World-renowned BBI Gold Colloid & Conjugates.
BBI’s optimized and proven production process yields citrate-capped nanospheres in sizes from 5nm up to 250nm with tight specifications in both size and %CV. This uniformity yields high batch-to-batch reproducibility, improving end-user manufacturability, reducing waste, and increasing speed to market. BBI’s large batch size, ISO-13485-certified manufacturing facility, and unparalleled quality results in a product with trusted performance year after year
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Gold Conjugate Starter Protocol
Protein conjugation can be complex, especially when developing a reproducible, scalable product.
Conjugation of proteins to gold depends upon three separate but dependent phenomena –
- Ionic attraction between negatively charged gold and positively charged protein
- Hydrophobic attraction between the protein and the gold surface
- Dative binding between the gold conducting electrons and sulphur atoms which may occur within amino
acids of the protein.
This protocol is a little bit of our expertise in a kit and is suitable for assessment of potential conjugation
conditions but is not necessarily suitable for production of conjugates at full manufacturing scale.
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Products & Services
Inside this catalog you’ll find one of the industry’s broadest collections of enzymes, antibodies, antigens, and more – meticulously developed to power world-class diagnostics and keep your pipeline moving.
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Reagents Range
Discover our collection of reagents covering a comprehensive range of biomarkers and applications for the IVD market, life sciences, cell culture and beyond.
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Frequently asked questions
Gold Colloid and Conjugates
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Gold Starter Packs
Are you using gold for the first time, or trying a new process and are unsure of which size particle to purchase? Our gold starter packs allow a comprehensive evaluation, comprising 100ml and/or 20ml each of a selection of our gold nanoparticles.
Delivering exceptional quality gold, time after time
With ≤5% odd shapes and a CV of ≤8%, the uniform shape and size of BBI gold ensures even antibody binding, giving reliable results in your assay.
View ProductsBBI particles are proven stable for up to 24 months and are supplied with a minimum of three month’s expiry. Stable particles ensure a settled testing regime, saving you time and wastage.
View ProductsOur batch sizes go up to 340l (40nm) to ensure you have a continuous supply.
View ProductsBBI gold must pass strict quality procedures before it's released to our customers, guaranteeing impressive performance characteristics at scale.
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Gold Nanoparticles
Size-matched colloid from 5 nm – 250 nm; ultra-uniform, ≥12-month stability and available in bulk ODs for seamless scale-up.
Control-line Conjugates
Reliable test validity using BSA, chicken IgY, mouse IgG or Protein A 40 nm conjugates – negative or positive controls on demand.
Gold Starter Packs
Unsure which diameter to pick? Evaluation kits supply four key sizes (5-40 nm or 20-80 nm) so you can optimise in a single order.
Tag Conjugates
Ready-made 40 nm labels against biotin, digoxin, FITC, His-tag or HRP—ideal for modular assay designs and multiplex formats.
Anti-human Conjugates
Goat or mouse antibodies to human IgG, IgM, IgA or IgE, adsorbed to 40 nm gold and delivered at OD 10.
Anti-species Conjugates
High-affinity goat antisera to mouse, rabbit or other species on 40 nm gold; build control or detection lines with confidence.
Fertility Conjugates
Monoclonal anti-hCG and anti-LH gold conjugates validated for rapid pregnancy and ovulation tests.
IN FOCUS
ISO Certifications
All our gold colloid and conjugates are manufactured at facilities certified to internationally recognised ISO13485 quality management standards – so your diagnostics start with a proven quality backbone.
Our ISO27001 certification ensures your data is safeguarded, and we’re now charting a path to ISO 14001 and ISO 45001 to fold sustainability and safety into every batch.
ADDING VALUE
Performance
Backed by 70 years of reagent expertise, BBI products are engineered for consistent, assay-grade performance - batch after batch.
Scalability
From pilot-scale to full scale industrial runs, our bioprocesses and global logistics flex with your forecasts, ensuring on-spec supply worldwide.
Compliance
ISO 13485 certification plus FDA registration and full documentation make every lot audit-ready - speeding global approvals and market entry.
Security
Global primary manufacturing and secure supply chains ensure security of supply, so your production timeline stays protected.
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GET IN TOUCH
Still need help? Talk to our team
Our customer service team is on hand to help with any questions you have or support you need.
And if the issue is technical, they’ll bring in our world-leading expert scientists to troubleshoot side-by-side with you and keep your project moving.
Contact us