Laboratory Water Quality Standards

ASTM D1193 (Types I–IV)

ParameterType I*Type II**Type III***Type IV
Conductivity (μS/cm) at 25oC, max0.0561.00.255.0
Resistivity (MΩ-cm) at 25oC, max18.01.04.00.2
pH at 25oC5.0–8.0
TOC (μg/l), max5050200No limit
Sodium (μg/l), max151050
Silica (μg/l), max33500No limit
Chloride (μg/l), max151050

*Requires use of 0.2 μm membrane filter; **Prepared by distillation; ***Requires the use of 0.45 μm membrane filter.

Clinical and Laboratory Standards Institute (CLSI) – formerly NCCLS

As of 2006, the CLSI has moved away from the typical Type I, II and III designations, instead preferring to suggest that water be simply ‘fit for purpose’, and only describes one grade in significant detail: Clinical Reagent Laboratory Water. The CLSI has also briefly outlined other grades in less detail, such Special Reagent Water (SRW) and instrument feed water.

ParameterCLSI-CLRW
Resistivity (MΩ·cm at 25°C)≥10.0
Conductivity (µS/cm at 25°C)≤0.1
TOC (ppb)≤500
Bacteria (CFU/mL)≤10
Endotoxins (EU/mL)≤0.25
Silica (mg/L)≤0.05
Particulates0.22 µm filtration recommended
pHNot specified

International Organization for Standardization (ISO)

The ISO based its specification on ISO 3696:1987, and specifies three grades of water: Grade 1, Grade 2 and Grade 3, where Grade 1 is the most pure (see below):

Water quality parameters for ISO grades

ParameterGrade 1Grade 2Grade 3
Resistivity (MΩ·cm at 25°C)≥10≥1Not specified
Conductivity (µS/cm at 25°C)≤0.1≤1.0≤5.0
TOC (ppb)≤50≤50Not specified
Bacteria (CFU/mL)≤10≤100Not specified
Silica (mg/L)≤0.01≤0.02≤0.05

www.purific.com

Buchanans Group Acquires Purific Industries.

A brief update from Purific industries.

Buchanans Group Pty Ltd has recently completed the acquisition of Purific Industries with the purpose to continue its reliable service to pathology laboratories nationally and ensure its growth in the future.

Founder John Atkinson is staying on as a vital member of the team. Having many years of experience in water purification and the pathology industry and a passion for the industry, he will be maintaining a technical advisory and manufacturing role within the new entity.

Buchanans Group brings a team of energetic and passionate individuals whose collective purpose is to improve the lives of our clients, Staff, and suppliers. With pathology being central to the diagnosis and analysis of all diseases affecting humanity, our team is extremely pleased to be able to support the pathologists who advance medicine and preserving life.

We would value any feedback you could give us, as we are fully committed to ensuring the continuance of Purific’s reliability.

A few key details:

Phone: 1800 573 316

24/7 Service: 0497 892 166

Service Requests: service@purific.com

Accounts: accounts@purific.com

Orders: orders@purific.com

We look forward to hearing from you, if we have not already.

Kind Regards,

The Purific Team.