National Institute for Occupational Safety and Health

Name: NIOSH Manual of Analytical Methods — Chlorinated and Organonitrogen Herbicides (Hand Wash) (9200)
Author: National Institute for Occupational Safety and Health

NIOSH Manual of Analytical Methods… (1994)

Summary

“NIOSH Manual of Analytical Methods — Chlorinated and Organonitrogen Herbicides (Hand Wash) (9200)”, published in 1994, is a work by National Institute for Occupational Safety and Health. It explores elements such as diazomethane, isopropanol and Fourth Edition CHLORINATED.

Quotes from NIOSH Manual of Analytical Methods… (National Institute for Occupational Safety and Health)

National Institute for Occupational Safety and Health, NIOSH Manual of Analytical Methods… (1994)

“ Prepare individual standard stock solutions of each herbicide of interest in isopropanol. NOTE: All herbicides in Table 1 were found to be soluble to at least 1 mg/mL, except simazine, which is soluble to 0.5 mg/mL. Calibration stock solution. Dilute the appropriate volume of herbicidestock solution to a known volume with isopropanol. NOTE: Spiking solutions may contain more than one analyte. Purified gases: helium, 5% methane in argon, or nitrogen.
See SPECIAL PRECAUTIONS SPECIAL PRECAUTIONS: Diazomethane has been cited as a carcinogen. It is extremely toxic and highly irritating. ”

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Source: Wikisource

National Institute for Occupational Safety and Health, NIOSH Manual of Analytical Methods… (1994)

“ Whenever the identity of an analyte is uncertain, confirmation may be achieved by analysis on a column of different polarity. If primary analysis was performed using a nonpolar or weakly polar column (e.g., DB-1 or DB-5) confirmation should be accomplished by reanalysis on a polar columne.g., ( DB-17 or DB-1701) . See Table 4 for approximate retention times for each column type. For positive identification of high-level analytes (1 to 10 μg/mL or greater) , GC/MS may be used. Table 5 provides notes on the analytical characteristics of the chlorinated and organonitrogen herbicides. ”

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Source: Wikisource

National Institute for Occupational Safety and Health, NIOSH Manual of Analytical Methods… (1994)

“ If the person’s hand seems “dried-out” after the handwash, hand lotion can be applied. 3. Shake hand in alcohol with constant back and forth motion for 30 seconds. Remove hand from bag and dry with paper towel. 4. Transfer solution to glass jar, cap securely. 5. Label and pack for shipment. 6. For field blank, add 150 mL isopropanol to a clean bag, shake for 30 seconds, then transfer the solvent to a glass jar for shipment. SAMPLE PREPARATION: 7. Pipette 10 mL of sample into a screw-top test tube with a PTFE-lined cap. 8. Add 0.5 mL of diazomethane derivatizing reagent. ”

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Source: Wikisource

National Institute for Occupational Safety and Health, NIOSH Manual of Analytical Methods… (1994)

“ NOTE: If peak height is greater than the range of the working standards, dilute with isopropanol and reanalyze. Apply the appropriate dilution factor in calculations. 14. Measure peak height of analyte. CALCULATIONS: 15. Determine the concentration, C (μg/mL) , of the herbicide found in the sample from the calibration graph. 16. Calculate the mass of herbicide, M (μg) , found in the volume, V (mL) , of hand wash solution. ”

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Source: Wikisource

National Institute for Occupational Safety and Health, NIOSH Manual of Analytical Methods… (1994)

“ Diazomethane may explode under some conditions. Do not heat above 90 °C. Avoid rough surfaces: fire-polish glass tubing, or use Teflon®. Do not expose solutions to strong light. Keep dilute ® solutions at 0 °C. Prepare in a hood [2] . Diazald is far more convenient to use on a large scale than the alkylnitrosonitroguanidines. Avoid skin contact with Diazald® and herbicides. Avoid skin contact and open flame with solvents. Wear appropriate protective clothing and work with these compounds in a well ventilated hood. SAMPLING: 1. Pour 150 mL of isopropanol into the polyethylene bag. ”

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Source: Wikisource

National Institute for Occupational Safety and Health, NIOSH Manual of Analytical Methods… (1994)

“ Agricultural spray additives can contribute serious interferences. Such additives include solvents, emulsifiers, wetting agents, breakdown products, and fertilizers (e.g., fatty acids and urea) . Second-column confirmation is very desirable.
OTHER METHODS: Other hand wash methods allowing simultaneous determination of organonitrogen and acid compounds and their esters are unknown.
NIOSH Manual of Analytical Methods (NMAM) , Fourth Edition CHLORINATED AND ORGANONITROGEN HERBICIDES (HAND WASH) : METHOD 9200 - Page 2 of 11
REAGENTS:
EQUIPMENT:
1. 2. 3. 4. ”

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Source: Wikisource

National Institute for Occupational Safety and Health, NIOSH Manual of Analytical Methods… (1994)

“ Allergies to alcohols are extremely rare. Before conducting thehandwash, check to see if the person has ever had a reaction to alcohols, or is taking medications that could react with the alcohol. Some skin conditions, such as cuts, abrasions, and eczema can be irritated by contact with alcohols. ”

National Institute for Occupational Safety and Health

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Quotes from NIOSH Manual of Analytical Methods… (National Institute for Occupational Safety and Health)

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