Quartz Laboratory Cuvette Supplier & Suppliers in Zagreb

Shipments to Zagreb and the wider Croatian territory are handled via premier international couriers (DHL Express, FedEx, UPS) directly to Franjo Tuđman Airport (ZAG) or regional hubs in Lučko. For university institutions (UNIZG) or state research centers (IRB) holding VAT/PDV exemption certificates or requiring standard EU customs entry, we supply full commercial documentation including certified Commercial Invoices, Packing Lists with precise Harmonized System (HS/TARIC) code 7017.10.00 (Laboratory Glassware of Fused Quartz or Fused Silica), and Certificate of Origin documents. Transit time typically ranges between 5 to 8 business days.

The distinction lies in the raw silica material and its electromagnetic transmission threshold. Standard optical glass (often marked as 'OG' or 'G') only transmits light in the visible spectrum from 340 nm to 2500 nm, rendering it useless for UV biological analysis. JGS2 quartz allows transmission from 220 nm to 2500 nm, which is acceptable for general laboratory work. JGS1 is high-purity synthetic fused silica that extends deep into the ultraviolet down to 190 nm, maintaining optical transmission ≥83% at 200 nm. For DNA/RNA (A260/A280) and peptide testing in Zagreb clinical laboratories, JGS1 is the essential standard.

Yes. In precision dual-beam UV-Vis spectrophotometers (such as those employed in pharmaceutical QC testing in Savski Marof), absorbance differences between the sample cell and reference cell can cause baseline errors. Nivra provides factory-tested Matched Pairs (sets of 2) and Matched Sets (sets of 4, 6, or 8) where each cuvette is optically indexed and matched to ensure transmission variance does not exceed ΔT < 0.1% at 200 nm and 250 nm.

Every individual cuvette undergoes ultrasonic cleaning, is sealed in an anti-static dust-free enclosure, and is placed in a custom-machined, high-density EVA foam case. These cases are enclosed in shock-absorbing multi-layer corrugated export cartons or fumigation-free solid timber crates for high-volume orders. In the rare event of transit damage, our guaranteed replacement policy ships replacements within 48 hours upon photographic verification.

Because our cuvettes are produced using high-temperature thermal molecular fusion (optical contact fusing at >1600 °C) without chemical glues or organic resin cements, they are chemically inert to virtually all acids and solvents. You can safely use concentrated hydrochloric acid (HCl), nitric acid (HNO3), aqua regia, chloroform, tetrahydrofuran (THF), DMSO, and acetonitrile. Note: Like all fused silica, quartz cuvettes should not be exposed to hydrofluoric acid (HF) or boiling concentrated phosphoric acid.

Yes. Nivra operates full in-house CNC glass machining, ultrasonic drilling, and precision optical polishing. If your research laboratory at Ruđer Bošković Institute or university department requires non-standard optical path lengths (e.g., 0.1 mm, 0.5 mm, 2 mm, 20 mm, 100 mm), screw-thread GL-14 ports, water-jacketed temperature-control chambers, or customized flow geometries, send your PDF, DWG, or STEP drawings to our engineering desk for review within 5 hours.

For standard 10 mm path length JGS1/JGS2 quartz cuvettes, our minimum order quantity starts from just 1 to 2 pieces (or 1 matched pair), allowing university laboratories and pilot research teams to validate quality prior to bulk orders. For customized optical glassware or OEM production runs, MOQs are flexible depending on dimensional complexity.

Never clean optical windows with abrasive cloths or wire brushes. We recommend soaking in a 2–5% solution of specialized laboratory detergent (such as Hellmanex III) or concentrated nitric acid for trace organic removal, followed by thorough rinsing with HPLC-grade deionized water (resistivity ≥18.2 MΩ·cm) and optical ethanol. Dry with a gentle stream of filtered inert nitrogen gas.