DTSC QC study

Waste Extraction is made up of what two analysis

WET Metals and Mercury

WET Metals is what EPA method

6010D

WET Mercury is what EPA method

7470

Carbofuran by GCQQQ is what epa method

3540 and 8270

Flashpoint is what epa method

1020B

GRO is what epa method

5030 5035

GRO by purge and trap GCFID

8015D

Hexvalent chromium in water HPLC ICP-MS

6020B

Mercury analysis by flow injection Mercury system

7470A 7471B

pH determination of solid and liquid waste

9045D 9040C

TCLP Metals and Mercury

1311, 6010D, 7470

When doing copper in seawater analysis what instrument do we use?

ICP-MS

What instrument do we use for 1,4 Dioxane

Purge and Trap GC

What instrument do we use for Diesal and motor oil range organics

Gas Chromatography with Flame Ionization Detection

What instrument do we use for Metals analysis

ICP-OES

What instrument do we use for Organichlorine pesticides

GC/QQQ

What instrument do we use for Organophosphorus pesticides

GCQQQ

What instrument do we use for PCB

GCQQQ

What instrument do we use for Pesticides in cannabis oil

GCQQQ

What instrument do we use for Pesticides in waste water

Liquid chromatography-mass spectrometry

What instrument do we use for PFAS

LC-MS

What instrument do we use for Polycyclic aromatic hydrocarbons (PAH)

GCQQQ

What instrument do we use for Total fluorine

CIC combustión ion chromatography

What instrument do we use forFor volatile organics

Purge and trap on the GC-MS

What does TSP stand for

Technical system procedure

What does the DCN stand for

Document control number

For a TSP what is does the DCN start with

04

For a QSP what does the DCN start with

02

What does QSP stand for

Quality system procedure

Scope

what a lab is capable of doing, authorized to do (could be through ISO) or equipped to test. This includes not just our methods but quality system as well

Verification of a method

Evidence that a given item fuflfils special requirement that confirm performance of measuring system

Validation

Verification where all requirement are adequate for intended use.

When a method is verified how do you validate it

Passing LOQ and PT

Accuracy

Closeness of agreement between measured quantity value and the true value

Precisión

Closeness of agreement between indications or measured quantity values obtained by replicates in the same conditions

Molarity

Is the number of moles per liter of solution

Molarity equation

Molarity = moles/ volume of solution

Solute

Substance that is dissolved in liquid

Solvent

Substance used to dissolve the solute

LOQ stands for ?

Limit of Quantification

LOD stands for ?

Limit of Detection

LOQs are run when

They are run ever quarter to maintain verification of a validated method according to ISO 17025

What is an LOQ ?

The smallest concentration of an analyte in a test sample that can be repeatedly and accurately measured

What is an LOD?

The smallest concentration of an analyte in a test sample that can be distinguished from zero

Method Blank

Sample containing clean matrix carried through all steps in TSP

For most inorganics analysis what should the MB be at ?

Analyte less than or equal to half the LOQ

What should you do if the MB does not pass the requirement according to the EPA method

Reanalyze or redigest the batch

What does LCS and LCSD stand for

Laboratory Control Sample and Duplicate

What is an LCS

Quality control sample of clean matrix spiked with a reference material containing analyses of interest at a known concentration

What do you do if your LCS fails

It is considered nonconforming work and you should initiate a CAR

How do you know if a LCS FAILED

The percent recovery has to be at a specific amount and the relative percent difference between the LCS and LCSD has to be less than 20%

A high relative percent difference tells you what when your samples are duplicate

It tells you that the samples matrix could be causing a chemical interference, there are contaminations, or instrument is lacking precision

What does MS/ MSD in QC batch samples mean

Matrix spike and Matrix spike dupe

What is an MS MSD

It is a sub sample spiked with analytes of interest from a reference material

What is an MS MSD used for ?

It is used to monitor matrix effects and any interferences that may be occurring to effect the recovery rate of the known spike concentration

How do you the MS and MSD PASS

Inorganic methods say that the percent recovery must be +- 25% and the RPD less than or equal 20%

What are surrogate compounds ?

They are compounds that mimic the behavior of target analytes but do not occur naturally in the environment

What are surrogate spikes used for ?

They are used to assess method performance for each sample extraction and assess the effects of the matrix on extractions

Calibration curve

Is a graphical curve that determines the concentration or value of the sample

The LOQ is used as what point in a calibration curve ?

If is the lowest part of the calibration curve

What does LCS stand for ?

Laboratory control sample

What is LCS

It is a sample of known concentration is used to