IH Equipment Flashcards
What are common PID applications?
- Hazardous waste monitoring to determine proper PPE
- Soil remediation from leaking underground storage tanks
- Oil refineries - VOC and benzene monitoring
- Aircraft - maintenance monitoring (jet fuel)
- Fire industry - arson and meth lab investigation
- Oil / chemical tankers
- Confined space entry
- Fenceline monitoring
- Indoor air quality ppb level and odor detection
What is HPLC used for?
Large molecules - PCBs, herbicides, insecticides, phthalates, isocyanates, formaldehyde
Way to remember: P for pesticides, PCBs, phthalates
What compounds are good for silica gel solid adsorbent?
Good for solid compounds - alcohols, amines, and phenols
What can be sampled with activated charcoal?
- Most hydrocarbons
- Chlorinated hydrocarbons
- Ester
- Ethers
- Alcohol
- Glycol ethers
What are FIDs good at detecting
- Aromatic hydrocarbons
- Moderately to chlorinated hydrocarbons
- Organic chemicals
- Low sensitivity to carbon monoxide and carbon dioxide
What do FIDs respond poorly to?
- Short chained alcohols
- Can’t detect formaldehyde
What can’t PIDs measure?
- Can’t measure components of air (O2, N2, CO2, H2O)
- Can’t measure common toxics (CO, HCN, SO2)
- Can’t measure natural gas (methane and ethane)
- Can’t measure acid gases (HCl, HF, HNO3, etc.)
- Qualitative results unless you know the chemical makeup of the atmosphere
- Poor selectivity (non-specific, you need to now the gas being measured to quantify)
What are PIDs good at detecting?
Hydrocarbons. Common hydrocarbons include acetone, ethanol, toluene, butanol, formaldehyde, methylene chloride.
- Aromatics (benzene, toluene, xylene)
- Alkyl iodides, bromides
- Double-bonded compounds
- Organic amines (methylamine, dimethylamine, trimethylamine..)
- Sulfides, and mercaptans
- Ketones, ethers, and silicates
What is atomic emission spectroscopy good at analyzing?
Trace elements, metals
What chemicals are detected by an FID?
A. Heavy metals
B. Aromatic hydrocarbons
C. Oxygen, nitrogen, argon, carbon dioxide
D. Radon and other radioactive gasses
B. Aromatic hydrocarbons
Propyl alcohol has an ionization potential of 10.15 eV. Can this be detected with a PID? What needs to be done to ensure detection?
A. Yes. Be sure to set the sampling rate greater than 2 liters per minute
B. Yes. Be sure to set the sampling rate less than 2 liters per minute
C. Yes. Be sure to use a lamp with an energy level greater than 10.15 eV.
D. No.
C. Yes. Be sure to use a lamp with an energy level greater than 10.15 eV.
What is the best method for sampling ammonia?
A. Silica gel tube with a sampling pump analyzed by gas chromatography.
B. Flame Ionization Device with data logging capability
C. MCE filter analyzed atomic emission spectroscopy.
D. Silica gel tube analyzed using ion chromatography.
D. Silica gel tube analyzed using ion chromatography.
What is the best method for sampling heavy metals in welding fumes?
A. Silica gel tube with a sampling pump analyzed by gas chromatography.
B. Flame Ionization Device with data logging capability
C. MCE filter analyzed atomic emission spectroscopy.
D. Silica gel tube analyzed using atomic absorption.
C. MCE filter analyzed atomic emission spectroscopy.
Which method is commonly used to analyze isocyanates?
A. HPLC with Fluorescence detector
B. XRF
C. Gravimetric
D. Ion Chromatography
A. HPLC with Fluorescence detector
Which substance might be analyzed using atomic absorption?
A. DDT
B. Lead
C. Polychlorinated biphenyls
D. Xylene
B. Lead
