INSTRUMENTAL ANALYSIS ACS ACTUAL EXAM
SCRIPT 2026 COMPLETE QUESTIONS AND
ANSWERS GRADED A+
● IR Source (Mono or Poly). Answer: Nernst Glower; Globular;
Incandescent: (Poly)
Laser(Mono)
● AA Source (mono or Poly). Answer: HCl(mono)
● AE Source (Mono or Poly). Answer: Plasma Falme(poly)
● Raman Source (mono or Poly). Answer: He/Ne Laser;Ar Laser;Yag
Laser:(mono)
● UV-Vis Sample Holder. Answer: Quartz, Glass, Plastic Cuvettes
● IR Sample Holder. Answer: salt plat; gas chamber
● AA Sample Holder. Answer: Graphite Tube; Flame
,● AE Sample Holder. Answer: inductively coupled plasma (ICP)
● Raman Sample Holder. Answer: Cuvette
● UV-Vis Wavelength Selector. Answer: Grating, Prism, Filter
● IR Wavelength Selector. Answer: Interferometer; monochromator
● AA Wavelength Selector. Answer: Monochrom. w/ grating
● AE Wavelength Selector. Answer: Monochrom.
● Raman Wavelength Selector. Answer: Monochrom. w/ grating;
Infermom. w/ laser
● UV-Vis Detector. Answer: Photomultiplier Tube(PMT); Photodiode
Array
● IR Detector. Answer: Thermal(dispersion); pyroelectric;
photoconducting
● AA Detector. Answer: PMT
,● AE Detector. Answer: PMT; Photodiode Array
● Raman Detector. Answer: PMT
● HPLC Mobile Phase. Answer: Rev Phase: Polar Solvent
Norm. Phase: Nonpolar Solvent
● GC Mobile Phase. Answer: He Gas
● HPLC Column Length. Answer: 10-30 cm
● GC Column length. Answer: 30-50 m
● HPLC Modes of Operation. Answer: 1. Isocratic
2. Gradient
● GC Modes of Operation. Answer: 1.Isothermal
2. Temp program
● HPLC Injection System and Amount. Answer: Loop System (10uL)
● GC Injection Syst. and Amount. Answer: Syringe (3-5uL)
, ● HPLC Sationary Phase. Answer: NP=Polar
RP=Nonpolar
● HPLC Detector. Answer: Z cell (UV)
● GC Detector. Answer: FID (flame ionization detector)
● HPLC Pump. Answer: Reciprocating
Displacement
● HPLC Chromotography. Answer: 1. Partition
2. Adsorption
3. Ion Exchange
4. Size Exclusion
5. Affinity
● what are the difference between calibration sensitivity and analytical
sensitivity. Answer: calibration sensitivity is the slope of a calibration
curve at the concentration of interest while analytical sensitivity is a
response to the noise ratio
SCRIPT 2026 COMPLETE QUESTIONS AND
ANSWERS GRADED A+
● IR Source (Mono or Poly). Answer: Nernst Glower; Globular;
Incandescent: (Poly)
Laser(Mono)
● AA Source (mono or Poly). Answer: HCl(mono)
● AE Source (Mono or Poly). Answer: Plasma Falme(poly)
● Raman Source (mono or Poly). Answer: He/Ne Laser;Ar Laser;Yag
Laser:(mono)
● UV-Vis Sample Holder. Answer: Quartz, Glass, Plastic Cuvettes
● IR Sample Holder. Answer: salt plat; gas chamber
● AA Sample Holder. Answer: Graphite Tube; Flame
,● AE Sample Holder. Answer: inductively coupled plasma (ICP)
● Raman Sample Holder. Answer: Cuvette
● UV-Vis Wavelength Selector. Answer: Grating, Prism, Filter
● IR Wavelength Selector. Answer: Interferometer; monochromator
● AA Wavelength Selector. Answer: Monochrom. w/ grating
● AE Wavelength Selector. Answer: Monochrom.
● Raman Wavelength Selector. Answer: Monochrom. w/ grating;
Infermom. w/ laser
● UV-Vis Detector. Answer: Photomultiplier Tube(PMT); Photodiode
Array
● IR Detector. Answer: Thermal(dispersion); pyroelectric;
photoconducting
● AA Detector. Answer: PMT
,● AE Detector. Answer: PMT; Photodiode Array
● Raman Detector. Answer: PMT
● HPLC Mobile Phase. Answer: Rev Phase: Polar Solvent
Norm. Phase: Nonpolar Solvent
● GC Mobile Phase. Answer: He Gas
● HPLC Column Length. Answer: 10-30 cm
● GC Column length. Answer: 30-50 m
● HPLC Modes of Operation. Answer: 1. Isocratic
2. Gradient
● GC Modes of Operation. Answer: 1.Isothermal
2. Temp program
● HPLC Injection System and Amount. Answer: Loop System (10uL)
● GC Injection Syst. and Amount. Answer: Syringe (3-5uL)
, ● HPLC Sationary Phase. Answer: NP=Polar
RP=Nonpolar
● HPLC Detector. Answer: Z cell (UV)
● GC Detector. Answer: FID (flame ionization detector)
● HPLC Pump. Answer: Reciprocating
Displacement
● HPLC Chromotography. Answer: 1. Partition
2. Adsorption
3. Ion Exchange
4. Size Exclusion
5. Affinity
● what are the difference between calibration sensitivity and analytical
sensitivity. Answer: calibration sensitivity is the slope of a calibration
curve at the concentration of interest while analytical sensitivity is a
response to the noise ratio
