Reagent Grade Water Type 2

In most modern labs type ii water is only used for rinsing glassware and as feed water to a type i di polishing system.

Reagent grade water type 2. As feed to type 1 water systems clinical analyzers cell culture incubators and weathering test chambers. International organization for standardization iso the iso based its specification on iso 3696 1987 and specifies three grades of water. Used for glassware rinsing filling autoclaves and heating baths and humidifiers. Used in buffers ph solutions and microbiological culture media preparation and for preparation of reagents for chemical analysis.

And for preparation of reagents for chemical analysis or synthesis. Essentially type ii water is cleaner than type iii ro water but not ultrapure like type i. Type ii water is a good choice to feed to instruments and clinical analyzers because there is less calcium buildup and it can also be used as feed water to a type i system. These specifications have been described by astm american socity for testing and materials d1193 iso international organization for standardization 3696 and clsi clrw.

Also used as feed water to type 1 systems. Grade 1 grade 2 and grade 3 where grade 1 is the most pure see below. Ion exchange distillation or reverse osmosis and organic adsorption may be required prior to distillation if the purity cannot be attained by single distillation. 1 2 2 type ii grade of reagent water shall be prepared by distillation using a still designed to produce a distillate having a conductivity of less than 1 0 µs cm at 298 k 25 o c.

As feed to type 1 water systems clinical analyzers cell culture incubators and weathering test chambers. Ion exchange distillation or reverse osmosis and organic adsorption may be required prior to distillation if the purity cannot be attained by single distillation. Type iv reagent grade water typically generated by reverse osmosis has become meaningless in that it has almost no practical use in the modern laboratory other than as feed water to a type i or type ii di system. Type 2 2 type 2 laboratory grade water is used in general laboratory applications such as buffers ph solutions and microbiological culture media preparation.

Type 2 2 type 2 laboratory grade water is used in general laboratory applications such as buffers ph solutions and microbiological culture media preparation. Water quality standards a american society for testing and materials astm d1193 91 standard specification for reagent grade water type 1 type 2 type 3 type 4. And for preparation of reagents for chemical analysis or synthesis. What does type 1 water mean.

Reagent water has quantitative specifications that describe the level of purity for the water.