Abbreviations and Symbols

Å

Angstrom(s)

AA

Atomic Absorption

abs

absolute

ACGIH

American Conference of Governmental Industrial Hygienists

ASTM

American Society for Testing Materials

atm

atmosphere(s)

avg

average

Bar

Bureau of Automotive Repair

bar

Unit of pressure equal to 100,000 pascals

bp

boiling point

Btu

British thermal unit(s)

CAA

Clean Air Act

cal

calorie(s)

CAS

Chemical Abstract Services

ccm

cubic centimeter(s) per minute

ccs

cubic centimeter(s) per second

CEM

Continuous Emission Monitor

cf

cubic feet

CFCs

Chlorofluorocarbons

CFR

Code of Federal Regulations

CGA

Compressed Gas Association

cm

centimeter(s)

cm²

square centimeter

cm³, cc

cubic centimeter

COA

Certificate of Analysis

COC

Certificate of Conformance

CP

Chemically Pure

Cp

specific heat at constant pressure

Cv

specific heat at constant volume

Cv

coefficient of flow

°C

degree(s) Celsius

DID

Discharge Ionization Detector

DIN

Deutsche Industrie Normen (German Industrial Standards)

DISS

Diameter Index Safety System

DOT

Department of Transportation

ea

each

ECD

Electron Capture Detector

EPA

Environmental Protection Agency

FID

Flame Ionization Detector

FNPT

Female National Pipe Thread

F.O.B.

Freight on Board

FPD

Flame Photometric Detector

FPT

Female Pipe Thread

ft

foot, feet

ft³, cu ft

cubic foot (feet)

FTIR

Fourier Transform Infrared Spectrometer or Spectroscopy

FIFRA

Federal Insecticide, Fungicide, and Rodenticide Act

°F

degree(s) Fahrenheit

g

gram(s)

gal

gallon(s)

GC

Gas Chromatography or Chromatograph

GMIS

Gas Manufacturers Intermediate Standard

GMP

Good Manufacturing Practice(s)

GPA

Gas Processors Association

Hall

Electrolytic Conductivity Detector

HAP

Hazardous Air Pollutants

HID

Helium Ionization Detector

hr

hour

Hz

hertz

ICP

Inductively Coupled Plasma (Spectroscopy)

ID

identification or inside diameter

IDLH

Immediately Dangerous to Life or Health

in

inch

in³, cu in

cubic inch(es)

ISO

International Organization for Standardization

J

joule

K

Kelvin

kg

kilogram(s)

kPa

Kilopascal(s)

°K

degree(s) Kelvin

L

liter(s)

lb

pound(s)

LC

Liquid Chromatography

LEL

Lower Explosive Limit

Lpm

liters per minute

μ

micron(s), 10–6 m

m3

cubic meter(s)

mA

milliampere

max

maximum

mg

milligram(s)

min

minute(s)

ml

milliliter(s)

mm

millimeter(s)

MNPT

Male National Pipe Thread

mol.wt.

molecular weight

MOS

Metal Oxide Semiconductor

MPT

Male Pipe Thread

mp

melting point

MS

Mass Spectrometry

MSDS

Material Safety Data Sheet

MTBE

Methyl Tertiary Butyl Ether

MVCR

Male VCR

MVFS

Male Vacuum Face Seal

MW

molecular weight

N/A

Not Applicable

nbp

normal boiling point

NDIR

Non–Dispersive Infrared Analyzer

NDUV

Non–Dispersive Ultraviolet Analyzer

NER

normal evaporation rate

NFNF

National Formulary

NFPA

National Fire Protection Association

NIOSH

National Institute for Occupational Safety and Health

NIST

National Institute of Standards and Technology

nm

nanometer(s)

NMR

Nuclear Magnetic Resonance Spectroscopy

No

number

nom

nominal

NOS

Not Otherwise Specified

NPD

Nitrogen/Phosphorous Detector

NPT

National Pipe Thread

NTP

Normal Temperature and Pressure

NTRM

NIST Traceable Reference Material

OD

Outside Diameter

Ohm–cm

ohms centimeter

OSHA

Occupational Safety and Health Administration

oz

ounce(s)

Pa

Pascal(s)

PAMS

Photochemical Air Monitoring Systems

PID

Photo Ionization Detector

ppb

part(s) per billion

ppba

part(s) per billion atomic

ppbv

part(s) per billion by volume

ppbw

part(s) per billion by weight

ppm

part(s) per million

ppma

part(s) per million atomic

ppmv

part(s) per million by volume

ppmw

part(s) per million by weight

ppt

part(s) per trillion

ppta

part(s) per trillion atomic

pptv

part(s) per trillion by volume

pptw

part(s) per trillion by weight

psi

pound(s) – force per square inch

psia

pound(s) – force per square inch absolute

psig

pound(s) – force per square inch gauge

QA

Quality Assurance

QC

Quality Control

Ra

Roughness average

RFO

Restricted Flow Orifice

°R

degree(s) Rankine

scc

standard cubic centimeters

sccm

standard cubic centimeters per minute

sccs

standard cubic centimeters per second

scfh

standard cubic feet per hour

scfm

standard cubic feet per minute

scfs

standard cubic feet per second

sec

second(s)

SFC

Supercritical Fluid Chromatography

SFE

Supercritical Fluid Extraction

slpm

standard liters per minute

sp. gr.

specific gravity

sp. vol.

specific volume

SRM

Standard Reference Materials

SS

Stainless Steel

Stn. Stl

Stainless Steel

STEL

Short Term Exposure Limit

STP

Standard Temperature and Pressure

TCD

Thermal Conductivity Detector

TEA

Transversely Excited Atmosphere

THC

Total Hydrocarbon Content

TLV

Threshold Limit Value

tp

triple point

TPH

Total Petroleum Hydrocarbons

TWA

Time Weighted Average

UEL

Upper Explosive Limiit

UHP

Ultra High Purity

UN

United Nations

USP

United States Pharmacopoeia

VAC

Volts Alternating Current

VDC

Volts Direct Current

VOC

Volatile Organic Compounds

vol

volume

vol%

volume percent

w.c.

water column pressure

wt.

weight

wt%

weight percent

wt. ppm

weight parts per million

yd

yard(s)

>

Greater than

≥

Greater than or equal

<