Trace metal analysis
Sub-ppb heavy metal levels make this SKU appropriate for trace metal sample preparation where instrument blanks must remain near baseline.
RW-UP1-1L
Ultrapure Type I Water
ASTM D1193 Type I — 18.2 MΩ·cm resistivity, TOC under 5 ppb. Polished by RO + EDI + 185 nm UV oxidation + 0.1 µm sterile filtration. A direct replacement for in-house Milli-Q output.
$44.99
$44.99 / L · CofA included
Pack size
ASTM D1193 Type I
CofA per lot
18.2 MΩ·cm
TOC < 5 ppb
Specifications
Resistivity18.2 MΩ·cm @ 25 °C
Conductivity< 0.056 µS/cm
TOC< 5 ppb
Filtration0.1 µm sterile filtered, polished via RO + EDI + 185 nm UV oxidation
Heavy metals< 1 ppb
StandardMeets ASTM D1193 Type I
ContainerHDPE laboratory bottle, tamper-evident closure
Lot trackingLot number printed on bottle; CofA accessible at /lab-results/
Applications
Where this SKU is used in research workflows.
ICP-MS sample prep
Dilute samples and acid blanks with confidence on ICP-MS workflows where adventitious metals at the ppb level would compromise quantitation.
Buffer preparation
Prepare assay buffers, electrophoresis buffers, and chromatography buffers from a known-purity baseline so the buffer composition is the only variable.
qPCR master mixes
Use as the diluent for qPCR master mixes and reagent dilutions where contaminating ions or organics would inhibit polymerase activity.
Research use only. This product is not for human or veterinary consumption, clinical use, diagnostic procedures, or therapeutic purposes. By purchasing, you affirm you are a qualified researcher or laboratory professional aged 21 or older.
Common questions
About this product.
Is this a true Milli-Q replacement?
Yes. Each lot meets ASTM D1193 Type I specifications: 18.2 MΩ·cm resistivity at 25 °C, TOC under 5 ppb, conductivity under 0.056 µS/cm, and 0.1 µm sterile filtration. Functionally interchangeable with output from a properly maintained in-house Type I system.
How long does the resistivity hold after opening?
Type I water absorbs CO₂ from air, which forms carbonic acid and decreases resistivity within minutes of exposure. For trace-sensitive applications, draw what you need and reseal. We recommend using opened bottles within 7 days for routine work and within 24 hours for trace metal or ion chromatography applications.
What's the difference between Type I, II, and III water?
Type I (this SKU) is the highest grade — 18.2 MΩ·cm, TOC under 5 ppb. Type II is intermediate (≥1 MΩ·cm) and suited to general laboratory use. Type III is the lowest grade (≥0.05 MΩ·cm) and used for glassware rinsing or feed water for higher-grade systems.
How do I download the Certificate of Analysis?
Visit our Lab Results portal and enter the lot number printed on the bottle. You'll receive the full CofA — including resistivity, TOC, heavy metal results, and manufacturing date — as a downloadable PDF.