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BARNSTEAD’S TECHNICAL APPLICATION BULLETIN T

BULLETIN 0010

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ALIDATIONOF

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. NANO

PURE ®

DI

AMOND

Trace Organic Compounds

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™

UV W

ATER

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everal high-sensitivity analytical methods were usedto identify any volatile or semivolatile organic con- tamination in NANOpure DIamond UV product water.The results indicate that the water is below the limit ofdetection for a broad range of organic compounds. of water was dispensed to drain to condition and rinse thefinal filter. Water samples were collected with suitably pre-pared glass sampling vials.

Purgeable Organic Compounds in Water by GC-MS EPA Method 524.2

I

NTRODUCTION

Performed by: The State Laboratory of Hygiene

University of Wisconsin Center for Health Sciences

The Barnstead NANOpure DIamond UV ultrapure water sys- tem (Model # D11911) irradiates system water with a combi-nation of 185 nm and 254 nm ultraviolet light to oxidize anddestroy organic carbon delivered by the feed water. The Organic Free cartridge pack (Model # D50280 for reverse osmosis or distallation feed and # D50281 for deionized feed) further reduces organic carbon and oxidation products with itsunique formulation of ion exchange resin and activated car- bon. Together the system provides a reliable source of waterto use with the most sensitive analytical methods for organic compounds. The water from the system was validated usingmethodologies designed to quantify and characterize volatile and semivolatile organic compounds. Each method used gaschromatography with mass spectrometry detection (GC-MS). The water feeding the DIamond was provided by each labora-tory’s central water system and exceeded the DIamond’s min-imum requirements. The system was equipped with a new Organic Free cartridge pack and a 0.2 micron hollow fiber final filter (D3750). The pack was purged of air with the “airpurge” menu selection and allowed to recirculate for 2 hours to condition the cartridge pack and system components.Figure 1 shows a typical “rinse-up” of the pack to a steady state value of Volatile organic compounds may be present in raw water orproduced during the chlorination of potable water. Volatile organic compounds were collected by purging inert gas through a DIamond UV sample and extracting the purged compounds with an adsorbent. The adsorbent was heated and backflushed with helium and the sample was analyzed with a Hewlett Packard GC equipped with a 5973 Mass Selective Detector. Table 1 lists the calibrated compounds and the results of the analysis. None of the compounds were detected in the DIamond UV water.

T

ABLE

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Volatile Organic Compounds

CompoundResult(ppb) CompoundResult(ppb) benzene<0.151,3-dichloropropane<0.15 bromobenzene<0.15 2,2-dichloropropane<0.15 bromochloromethane<0.15 1,1-dichloropropene<0.15 bromodichloromethane<0.15 cis-1,3-dichloropropene<0.15 bromoform<0.15 trans-1,3-dichloropropene<0.15 bromomethane<0.15 ethylbenzene<0.15 n-butylbenzene<0.15 hexachlorobutadiene<0.15 sec-butylbenzene<0.15 isopropylbenzene<0.15 tert-butylbenzene<0.15 p-isopropyltoluene<0.15 carbon tetrachloride<0.15 methyl-tert-butyl ether<0.15 chlorobenzene<0.15 methylene chloride<0.15 chloroethane<0.15 naphthalene<0.15 chloroform<0.15 n-propylbenzene<0.15 chloromethane<0.15 styrene<0.15 2-chlorotoluene<0.15 1,1,1,2-tetrachloroethane<0.15 4-chlorotoluene<0.151,1,2,2-tetrachloroethane<0.15 dibromochloromethane<0.15 tetrachloroethylene<0.15 1,2-dibromo-3-chloropropane<0.15 toluene<0.15 1,2-dibromoethane<0.15 1,2,3-trichlorobenzene<0.15 dibromomethane<0.15 1,2,4-trichlorobenzene<0.15 1,2-dichlorobenzene<0.15 1,1,1-trichloroethane<0.15 1,3-dichlorobenzene<0.15 1,1,2-trichloroethane<0.15 1,4-dichlorobenzene<0.15 trichloroethylene<0.15 dichlorodiflouromethane<0.15 trichlorofluoromethane<0.15 1,1-dichloroethane<0.15 1,2,3-trichloropropane<0.15 1,2-dichloroethane<0.15 1,2,4-trimethylbenzene<0.15 1,1-dichloroethylene<0.15 1,3,5-trimethylbenzene<0.15 cis-1,2-dichloroethylene<0.15 vinyl chloride<0.15 trans-1,2-dichloroethylene<0.15 m/p-xylene<0.15 1,2-dichloropropane<0.15 o-xylene<0.15

2 ppb total organic carbon (TOC) and 18.2M Ω -cm resistivity. After the rinse period, approximately 10 L

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IGURE

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Diamond UV: New Organic Free Cartridge PackRinse-Up Results reportes as < Limit of Detection