Required Detection Limit Check

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Required Detection Limit Check

The DQM Check for Required Detection Limit compares the reporting detection limit of each result to a client specified "project required detection limit" for each analyte.

 

Check

 

Check name is EarthSoft.DQM.RequiredDetectionLimit = Required Detection Limit.

 

Parameters

 

This check uses the reportable_result and test_batch_type parameters from Global Parameters.

 

There are five other parameters specific to this Check:

1.detection_limit_column - To allow the user to specify which DT_RESULT column to use as the "reporting detection limit":

REPORTING_DETECTION_LIMIT

METHOD_DETECTION_LIMIT or

QUANTITATION_LIMIT

2.sample_type_code  

a.defaults to "N"

3.result_type_code  

b.defaults to "TRG"

4.non-adjusted_only  

c.defaults to "N"

d.selection of "Y" will exclude results with a dilution factor > 1 from this check.

5.non_detect_only  

e.defaults to "Y"

f.selection of "N" will include results with DETECT_FLAG =Y in this check.

 

Rules

 

There is one rule and it is "EXCEEDS REQUIRED DETECTION LIMIT".

 

Exceptions

 

Qualify a result if:

DT_RESULT. REPORTING_DETECTION_LIMIT (or . METHOD_DETECTION_LIMIT or . QUANTITATION_LIMIT, depending on which column is specified by the detection_limit_column parameter) > RT_DQM_CONTROL_LIMITS. REQUIRED_DETECT_LIMIT

 

To enable this check to run, "project required detection limits" will need to be entered in the REQUIRED_DETECT_LIMIT and REQUIRED_DETECT_LIMIT_UNIT columns of the RT_DQM_CONTROL_LIMITS table for each Analytic Method and/or CAS_RN in the analytic results of the database.

 

Errors

 

In the Errors tab of the DQM Event Review Form these errors may be listed:

"One of the required rules for this check is not present in the RT_DQM_RULE table."
If you receive this error, the QAPP can be updated following the How to Update Existing QAPPs documentation page.

"The value in the {0} column is null or not numeric at" DT_RESULT.REPORTING_DETECTION_LIMIT (or . METHOD_DETECTION_LIMIT or . QUANTITATION_LIMIT, depending on which column is specified by the detection_limit_column parameter).

"The REQUIRED_DETECTION_LIMIT column in RT_DQM_CONTROL_LIMITS is NULL for SYS_SAMPLE_CODE = 'XXX'; ANALYTIC_METHOD = 'YYY'; CAS_RN = 'ZZZ'"
RT_DQM_CONTROL_LIMITS. REQUIRED_DETECT_LIMIT is null or not numeric for the record listed. The check will be skipped for this record.

"The DILUTION_FACTOR column is NULL or not numeric at SYS_SAMPLE_CODE = 'XXX'; ANALYTIC_METHOD = 'YYY'; CAS_RN = 'ZZZ'"
DILUTION_FACTOR is null or non-numeric when non_adjust_only =Y for the record listed. The check will be skipped for this record.