Important PT / Primary Accreditation Information
A laboratory must maintain a history of successful
participation in (Passed) 2 out of the last 3 studies. 2 PT Studies per year
must be performed for each matrix-technology/method-analyte combination for
which the laboratory is seeking accreditation.
The minimum time between the closing date of one study and
the shipment date of the next is 15 days. (This will help if you are trying to
add analyses to your accreditation or regaining accreditation after loosing it).
The 2 PT studies you perform per year should be about 6 months apart. If you go
more than 6 months between the reporting of 2 studies you will be graded as
having a Missed / Failed study.
A major change has taken place in the way that accreditation
is granted. Before July 1, 2003 accreditation was granted by program-method-analyte.
With the institution of the 2001 NELAC Standards, accreditation is now granted
by matrix-technology/method-analyte/analyte group.
How will this change possibly affect you?
If you are seeking accreditation for 3 methods within one
category, say metals, you must analyze PT samples by each of the technologies
every six months. For instance, if you analyze PT samples for metal X by ICP
(EPA 200.7), ICP-MS (EPA 200.8), and graphite furnace (EPA 200.9), you must
analyze PT samples by each of these technologies at least twice a year. ICP, ICP-MS
and Graphite Furnace are considered 3 different technologies. The 3 analyses may
come out of the same PT Study. The good news is that you would not loose
accreditation for metal X for ICP and ICP-MS if you have trouble analyzing
samples by graphite furnace. If you analyze samples for metals X by multiple
methods that are the same technology (for instance EPA 200.7 and SM 3120B), you
only need to analyze the samples by each method at least once a year; by EPA
200.7 on your 1st study and by SM 3120 B on the 2nd study.
If a microbiology laboratory is running Total Coliform by 2
different technologies, each technology must be run twice a year. Again, these
analyses may come from the same PT sample. If Total Coliform is being run by 2
different methods, but these have same technologies, one method should be run
with the 1st PT Study and the other method should be run with the 2nd
PT Study.
A list of "Technologies" is attached. Technology information
will begin appearing on the Analyte Lists.
At this time, NH ELAP grants accreditation for drinking water
and non-potable water only (non-potable water is listed as wastewater). When NH
ELAP begins accrediting for RCRA methods, the matrix "Solid and Chemical
Materials" will be added.
We are working on forming "analyte groups" at this time.
If you are not sure how this may affect you, please call us
to make sure you do not loose accreditation for missed studies.
Thank you.
NH ELAP
Technology Key NH ELAP Technology Description (11/03)
CVAAS
FAAS
GFAAS
HGAAS
DCP-AES
FAES
ICP-MS
ICP-AES
GC-MS
GC-HRMS
GC-ELCD
GC-ECD
GC-FID
GC-FTIR
GC-NPD
GC-PID
GRAV
HPLC-PBMS
HPLC-TSMS
HPLC-EC
HPLC-UV
HPLC-FLUOR
IC
DPP
POL
AMP
ASV
COND
GALV
POT
COUL
COLOR
FLUOR
IR
GS-HR
GS-LR
SC
SC-L
PC
AS
TITR
MF
MPN
CF
PA
HPC
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Atomic Spectrometry & Inorganic Mass Spectrometry
Atomic Absorption - Cold Vapor Spectrometry
Atomic Absorption - Flame Spectrometry
Atomic Absorption - Graphite Furnace Spectrometry
Atomic Absorption - Hydride Generation Spectrometry
Atomic Emission - Direct Currrent Plasma Spectrometry
Atomic Emission - Flame Spectrometry
Mass Spectrometry - Inductively Coupled Plasma
Atomic Emission - Inductvely Coupled Plasma Spectrometry
Gas Chromatography
Gas Chromatography - Mass Spectrometry
Gas Chromatography - Mass Spectrometry - High Resolution
Gas Chromatography - Electrolytic Conductivity Detection
Gas Chromatography - Electron Capture Detection
Gas Chromatography - Flame Ionization Detection
Gas Chromatography - Fourier Transform Infrared Spectrometry
Gas Chromatography - Nitrogen/phosphorus Detection
Gas Chromatography - Photoionization Detection
Gravimetry
Gravimetry
Liquid Chromatography
High Performance Liquid Chromatography - Mass Spectrometry - Particle
Beam
High Performance Liquid Chromatography - Mass Spectrometry -
Thermospray
High Performance Liquid Chromatography - Electrochemical
High Performance Liquid Chromatography - Ultraviolet/visible
Molecular Absorption
High Performance Liquid Chromatography - Ultraviolet/visible
Molecular Fluorescence
Ion Chromatography
Electrochemistry
Differential Pulse Polarography
Polarographic Probe
Amperometric Titration
Anodic Stripping Voltammetry
Conductance
Galvanic Probe
Potentiometry
Coulometric Titration
Molecular Spectrometry
Ultraviolet or Visible Molecular Absorption Spectrometry
Ultraviolet or Visible Molecular Fluorescence Spectrometry
Infrared Spectrmetry
Radioanalytical Technology
Gamma Spectrometry - High Resolution
Gamma Spectrometry - Low resolution
Scintillation Counting
Liquid Scintillation Counting
Proportional Counting
Alpha Spectrometry
Titrimetry - Visual Indicator
Visual Indicator
Microbiology
Membrane Filters
Most Probable Number
Chlorofluorogenic
Present / Absent
Heterotrophic Plate Count
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