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Test name	Service category	Key Test
Naphthalene by modified NIOSH 1501	Industrial Hygiene (IH) Lab Services	Other
Natural Rubber Latex (NRL) Allergen Testing	Consumer Products Testing	Other
n-Butanol alcohol (n-butanol) by NIOSH 1401	Industrial Hygiene (IH) Lab Services	Other
n-Butyl acetate by NIOSH 1450	Industrial Hygiene (IH) Lab Services	Other
Neosolaniol	Food and Beverage Testing	Other
New Rug Odor (4-Phenylcyclohexene or 4-PC or 4-PCH) by CSI Method	Industrial Hygiene (IH) Lab Services	Other
n-Hexane by NIOSH 1500	Industrial Hygiene (IH) Lab Services	Other
Nickel (Ni)	Environmental Chemistry Lab Services	Metals
Nicotine (Bulk or wipe) by modified NIOSH 2551	Industrial Hygiene (IH) Lab Services	Other
Nicotine by NIOSH 2544/2551	Industrial Hygiene (IH) Lab Services	Other
NIOSH 0500 (Nuisance Dust, Total) Air Type	Industrial Hygiene (IH) Lab Services	Other
NIOSH 0600 (Nuisance Dust, Respirable) Air Type	Industrial Hygiene (IH) Lab Services	Other
NIOSH 5000 (Gravimetric analysis only for Carbon Black)	Materials Testing Lab	Fire Investigation
NIOSH 5000 (Includes TEM Confirmation)	Materials Testing Lab	Fire Investigation
NIOSH 9002	Indoor Air Quality (IAQ) Lab Services	Other
Nisin (fructant)	Food and Beverage Testing	Other
Nitrate as N	Environmental Chemistry Lab Services	Other
Nitric Acid by NIOSH 7903	Industrial Hygiene (IH) Lab Services	Other
Nitrifying Bacteria (N)	Microbiology Laboratory	Aquatic Microbiology
Nitrite as N	Environmental Chemistry Lab Services	Other
Nitrogen - Ammonia	Environmental Chemistry Lab Services	Other
Nitrogen - Nitrate	Environmental Chemistry Lab Services	Other
Nitrogen - Nitrate / Nitrite	Environmental Chemistry Lab Services	Other
Nitrogen - Organic	Environmental Chemistry Lab Services	Other
Nitrogen - Total Kjeldahl (TKN)	Environmental Chemistry Lab Services	Other
Nitrogen Dioxide/Nitrogen Oxide (NOX) by NIOSH 6014/OSHA ID 182	Industrial Hygiene (IH) Lab Services	Other
Nivalenol	Food and Beverage Testing	Other
NJID 27 (WASTE CHARACTERIZATION)	Environmental Chemistry Lab Services	Other
NMR	Materials Testing Lab	Polymers, Plastics, Paints and Coatings
n-Octane by NIOSH 1500	Industrial Hygiene (IH) Lab Services	Other
Non Asbestos Respirable Fibers (NARF's)	Asbestos Lab Services	Other
Non-Volatile Extraction	Environmental Chemistry Lab Services	Other
Noodles too soft	Materials Testing Lab	Other
n-Propyl acetate by NIOSH 1450	Industrial Hygiene (IH) Lab Services	Other
n-Propyl alcohol (n-propanol) by NIOSH 1401	Industrial Hygiene (IH) Lab Services	Other
Nucleotides, (citicoline, ATP)	Food and Beverage Testing	Other
Nuisance Dust and PM-10 / TSP	Indoor Air Quality (IAQ) Lab Services	Other
Nutritional Labeling	Consumer Products Testing	Other
NY ELAP Method 198.1	Asbestos Lab Services	PLM Asbestos
NY ELAP Method 198.1	Indoor Air Quality (IAQ) Lab Services	Other
NY ELAP Method 198.4 (TEM with Gravimetric Prep)	Indoor Air Quality (IAQ) Lab Services	Other
NY ELAP Method 198.4 (TEM with Gravimetric Prep)	Asbestos Lab Services	TEM Asbestos
NY ELAP Method 198.6 (PLM with Gravimetric Prep)	Asbestos Lab Services	PLM Asbestos
NY ELAP Method 198.6 (PLM with Gravimetric Prep)	Indoor Air Quality (IAQ) Lab Services	Other
NYC 31-E-10 Sec. 3.4.9 Water Resistance	Materials Testing Lab - Polymers, Plastics, Paints and Coatings Testing	Polymers, Plastics, Paints and Coatings
NYC 31-P-95 Sec. 5.2 Boiling Water Resistance	Materials Testing Lab - Polymers, Plastics, Paints and Coatings Testing	Polymers, Plastics, Paints and Coatings
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