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APPENDIX Lg PART 3 SiJ_ETY, `FEST MATERIALS AND ORDERING SAFETY benzotriazole tests.Special UV safety glasses will pro- Safety is the responsibility of each individual when per- tett the eyes from burns due to UV radiation. forming analysis procedures,and the analyst must de- Use tongs or finger cots when transferring apparatus velop and maintain good safety habits.Because many that is hot. of the procedures in this methods handbook raquire he use of potentially hazardous chemicals and apparatus,it Use Mechanical Pipeltors:Mouth pipetting could re- is important that the individual conducting them prae- suit in accidentally ingesting a dangerous chemical. tice good laboratory techniques to minimize the Make a habit of using mechanical pipetting devices by chances for accidents. In the following paragraphs,a using ffiem for all pipetting.Mistakes that could cause number of technique rules tha?apply to water analysis serious injury will be avoided,and you won't run the s in the laboratory and in the field are presented.They are risk of contaminating your sample with saliva, not all inclusive,of course,nor do they apply only to the procedures provided in this handbook. They are Use Special Care With Dangerous Chemicals and general in nature but emphasize practices that are often Apparatus: Follow the test procedure steps carefully key factors in personal injury incidents. and observe all precautionary measures.It is good prac- )Read Labels Carefully:Each reagent label should be tice to read the entire procedure carefully before begin- read careful l y with particular attention paid to the re- ning.he procedure.Use the safety equipment—such cautionary informal on.Never remove he label from a as pipet fillers, protective clothing and ventilating reagent container while it still contains reagent.Do not hoods-- appropriate for the test being conducted. Wipe up all spills promptly.Do not smoke or cat in an _ put a different reagent into a labeled container without area where toxic or irritating chemicals are used. Use changing the label.When preparing a reagent or stand- reagents and apparatus only as they were meant to be asd solution,be sure to label the container clearly. used and use them only as directed in the test procedure. Warning labels also appear on some of the apparatus Damaged labware and malfunctioning equipment used with the test procedures. The protective shields should not be used. with the COD Reactor and the Digesdahl Digestion Ap- In case of accidental skin contact with acids or bases, pamtus point out potential hazards. Be sure these serious burns can be prevented by immediately apply- shields are in place during use and observe the pmeau- Ting baking soda or vinegar,respectively,to the affected tions they recd-,=end. area. Many laboratories keep these two household Wear Protective Clothing:Protective clothing should items handy for quick remedial action. ` be worn when handling chemicals that cause irritation or bums. Eye protection in particular is important to In the table that iolIaws,rcttgcnts(used in the prate- dures contained in this handbook) that carry the guard against spattering and splashes from accidental .. spills when caustic materials are being used. Danger' classification on their labels cue listed al- } phabetically.The type of hazard each reagent presents Eye protection should be worn also when using the ul- is given along with the appropriate first aid informs- tmviolet(UV)lamp specified in the phosphonate and tion. z, 3•Z ,y