Eye Protection Adequate eye protection is required for all individuals in the laboratory. Do not remove your eye protection until you have physically left the lab room. The following types of eye protection are acceptable. Protective glasses and face shields that cover corrective prescription lenses are commercially available and/or from Chemistry Stores. • Normal prescription eyeglasses, either with or without safety side shields as long as the glasses are shatterproof and cover a large enough area surrounding your eye (this usually means that the frames must be a minimum of 2 inches (5 cm) from top to bottom as well as from side to side). NOTE: check size restrictions with your supervisor/instructor. Use safety glasses with side shields that have been approved by the CSA. • Where exposure to toxic or irritating fumes could be a problem, the best form of eye protection is safety goggles. Safety goggles that will form a tight seal to your face. • Contact lenses can be a hazard and sometimes should not be worn in the lab. Therefore contact lenses wearers have three options in the labs: a) remove the contact lens before entering the lab and wear safety glasses or safety goggles. b) replace the contact lens with prescription glasses c) wear the contact lens into the lab under a pair of safety goggles but you must inform your supervisor/ instructor about it. • A full-face shield is highly recommended when there is a risk of explosion or splashing, or with combustion and high temperature reactions.
Respirators Respirators used at the University of British Columbia must provide effective protection against airborne contaminants which may be present. Use of respirators should be considered to control exposure only after engineering and administrative controls have been considered. These types of controls include ventilation (e.g. fume hoods), enclosing the process, substitution of less hazardous products, rescheduling of work procedures, etc. Users are responsible for: 1. Obtaining proper certification for respirator use by H.S.&E. 2. Using the respirator in accordance with training instructions 3. Being properly fit-tested for a respirator 4. Cleaning, disinfecting, and storing the respirator 5. Reporting any respirator malfunction to their supervisor
PERSONNEL MUST BE CERTIFIED BY HS&E PRIOR TO RESPIRATOR USE. When fitting a new respirator, try on several brands and sizes. Different brands will fit slightly differently on your face. Respirator manufacturers usually have small, medium, and large face-pieces available. Adjust the straps so that the respirator fits tightly, but does not dig into your face or leave red marks on your skin. The respirator should feel snug, yet comfortable. 1. Remove respirator, cartridges, and filters from plastic bags. Check to see that gasket is in cartridge holder before screwing in cartridges. Insert filter into retainer caps and snap onto cartridge holder or cartridges. 2. The cartridge holders are keyed to assure their correct positioning and maintain the proper balance of the device. Make sure they are properly positioned and seated. 3. Place respirator on face with narrow end over nose and bottom under chin. First attach top headband around crown of head and then bottom around neck. Adjust headbands until a tight but comfortable fit is obtained. 4. TEST FOR TIGHTNESS: Place the palm of the hand or thumb over the valve guard and press lightly. Exhale to cause a slight pressure inside face piece. If no air escapes, respirator is properly fitted. If air escapes, readjust respirator and test again. There are two simple checks to test the seal. These are called the positive and negative pressure fit-checks. These tests must be done EVERY TIME the respirator is put on (see overleaf). 5. FILTERS: (a) REPLACE when breathing becomes difficult, INSERT new filters INTO retainer cap and replace cap. Generally the filter discs should be changed after eight hours of dusty exposure. (b) CHEMICAL CARTRIDGES should be replaced when the senses detect ANY abnormal condition, assuming that levels of detection by the senses do not constitute a health hazard. 6. MAINTENANCE: The respirator face piece should be cleaned daily to prevent skin irritation and for general sanitary purposes. First remove filters and cartridges. Then the face piece may be washed with a hand brush using a good detergent in warm water, rinsing, and air drying in a clean place. Some compounds considered to be suitable for disinfecting are: (1) a hypochlorite solution (50 parts per million of chlorine; immersion time: 2 minutes) (2) an aqueous solution of iodine (50 ppm iodine; immersion time: 2 minutes) (3) a quaternary ammonium solution (200 ppm quaternary ammonium compounds in water with less than 500 ppm total hardness). RINSE IN CLEAN WARM WATER AND AIR DRY. Inspect respirator daily for worn or faulty parts and replace these at once. Proper parts supplied by the manufacturer must be used. 7. For your protection, the DUST FILTERS and CHEMICAL CARTRIDGES must be assembled tightly, and changed frequently, according to exposure. 8. KEEP RESPIRATOR CLEAN when not in use. Store in container provided.
NEGATIVE PRESSURE FIT-CHECK a) Put the respirator on and tighten the straps until it feels tight but comfortable. b) Close off the cartridges by covering them gently with the palm of hands, plastic bags, or gloves. c) Breathe in slightly to create a vacuum. d) Hold for 10 seconds. e) If you have a good seal, the face piece should collapse slightly against your face and stay collapsed. No air should leak into the face piece past the sides, top, or bottom. f) If the face piece doesn’t collapse and stay collapsed, there is an air leak. Check the exhalation valves and try repositioning the respirator on your face and adjusting the head straps. Try the negative pressure check again. If you cannot get a seal after a few attempts, try on another size, make, or model of respirator, and repeat the check until you find a respirator that will pass.
POSITIVE PRESSURE FIT-CHECK a) With the respirator on comfortably, close off the exhaust valve opening by covering it with the palm of the hand. b) Breathe out slightly to force air into the face piece c) Hold for 10 seconds. d) If you have a good seal, the face piece should bulge out and stay out. e) If the air does leak out, check the inhalation valves, readjust the respirator and try the check again. Try on another size, make or model if you fail to pass the positive pressure fit-check.
我的社区
签到
赛默飞实验室产品焕新计划有奖调研！
【七月征文】不一YOUNG实验“猿”
报名开启：ICS2024第十三届光谱网络会议！
推荐收藏！盘点中药材及饮片检测解决方案
