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CWEA LABORATORY ANALYST CERTIFICATION EXAM ALL GRADES | ACCURATE REAL EXAM VERSIONS | CURRENTLY TESTING WITH A STUDY GUIDE AND KNOWLEDGE CHECK FLASHCARDS | GUARANTEED PASS
What does COLOR measure? - CORRECT ANSWER Amount of color units (CU) in a sample.
Color caused by natural metallic ions (Fe & Mg) & industrial wastes.
What is the test summary for COLOR? - CORRECT ANSWER Sample -> Tubes -> Compare
to color standards over light source
Which of the following techniques is used to isolate anionic surfactants (as MBAS) from the
sample matrix? - CORRECT ANSWER Extraction
In the cyanide determination, which one of the following is not an interference? - CORRECT
ANSWER Halogenated aromatics
Which of the following is not a major interference in phenol determination? - CORRECT
ANSWER Hydroxy derivatives of benzene
A freshly prepared sodium hydroxide (NaOH) solution is standardized against primary standard
potassium acid phthalate (KHC8H4O4). 0.8000 grams of potassium acid phthalate was dissolved
into 50 mL CO2-free water. 2-3 drops of phenolphthalein were added. The sample was titrated to
a faint pink endpoint with 22 mLs sodium hydroxide. What is the normality of the sodium
hydroxide? - CORRECT ANSWER 0.178 N
What does an ICP source consist of? - CORRECT ANSWER A flowing stream of argon gas
ionized by an applied radio frequency
In gas chromatography, electron capture detectors (ECD) are used to detect which of the
following compounds? - CORRECT ANSWER Chlorinated hydrocarbon pesticides
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