It is the user's responsibility to use safe and proper techniques in handling materials in this test method. Manufacturers MUST be consulted for specific details such as material safety data sheets<br>and other manufacturer's recommendadons. All OSHA standards and rules must also be consulted and followed.<br> 4.1 Good laboratory practice should be followed. Wear safety glasses in all laboratory areas.<br> 4.2 When handling glacial acetic acid to prepare Nash reagent, use chemical goggles or face shield, impervious gloves and an impervious apron during preparation. Concentrated acids should be handled only in an adequately ventilated laboratory hood. CAUTION: Always add<br>acid to water.<br> 4.3 Formaldehyde is a sensory irritant and potential sensitizer. Its chronic toxicity has not been fully established. Use in an adequately ventilated laboratory hood.<br>Avoid inhalation or skin contact. Use chemical goggles or face shield, impervious gloves and an impervious apron when working with formaldehyde (see 8.1).<br> 4.4 An eyewash/safety shower should be located nearby and a selfontained breathing apparatus should be readily available for emergency use.<br> 4.5 Exposure to chemicals used in this procedure must be controlled at or below levels set by governmental authorities(e.g., Occupational Safety and Health Administration's [OSHA] permissible exposure limits [PEL] as found in 29 CFR 1910.1000; see web site:<br>www.osha.gov for latest version). In addition, the American Conference of Governmental Industrial Hygienists (ACGIH)<br>Threshold Limit Values (TLVs) comprised of time weighted averages (TLVTWA), short term exposure limits (TLVSTEL) and ceiling limits (TLV C) are recommended as a general guide for air<br>contaminant exposure which should be met (see 13.7).<br>5. Uses and Limitations<br> 5.1 The procedure is intended for use in the range of releasable formaldehyde on hydrophobic and non-hydrophobic fabrics up to about 3500 dug/g. The upper limits are 500 dug/g if a 1:1 ratio of Nash reagent to sample solution is used in the analytical portion of the test and 3500 dug/g if a 10:1 ratio is used. The procedure ...
正在翻譯中..