ASTM-D7600 Standard Test Method for Determination of Aldicarb, Carbofuran, Oxamyl and Methomyl by Liquid Chromatography/Tandem Mass Spectrometry

ASTM-D7600 - 2016 R17 EDITION - CURRENT
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Standard Test Method for Determination of Aldicarb, Carbofuran, Oxamyl and Methomyl by Liquid Chromatography/Tandem Mass Spectrometry
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Scope

1.1 This procedure covers the determination of aldicarb, carbofuran, oxamyl and methomyl (referred to collectively as carbamates in this test method) in surface water by direct injection using liquid chromatography (LC) and detected with tandem mass spectrometry (MS/MS). These analytes are qualitatively and quantitatively determined by this test method. This test method adheres to multiple reaction monitoring (MRM) mass spectrometry.

1.2 This test method has been developed by U.S. EPA Region 5 Chicago Regional Laboratory (CRL).

1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.4 The Detection Verification Level (DVL) and Reporting Range for the carbamates are listed in Table 1.

TABLE 1 Detection Verification Level and Reporting Range

Analyte

DVL (ng/L)

Reporting Range (μg/L)

Aldicarb

100

1–100

Carbofuran

100

1–100

Oxamyl

100

1–100

Methomyl

100

1–100

1.4.1 The DVL is required to be at a concentration at least 3 times below the Reporting Limit (RL) and have a signal/noise ratio greater than 3:1. Fig. 1 displays the signal/noise ratios of the primary single reaction monitoring (SRM) transitions and Fig. 2 displays the confirmatory SRM transitions at the DVLs for the carbamates.

FIG. 1 Example Primary SRM Chromatograms Signal/Noise Ratios

Example Primary SRM Chromatograms Signal/Noise RatiosExample Primary SRM Chromatograms Signal/Noise Ratios

FIG. 2 Example Confirmatory SRM Chromatograms Signal/Noise Ratios

Example Confirmatory SRM Chromatograms Signal/Noise
 RatiosExample Confirmatory SRM Chromatograms Signal/Noise
 Ratios

1.4.2 The reporting limit is the concentration of the Level 1 calibration standard as shown in Table 2 for the carbamates.

TABLE 2 Concentrations of Calibration Standards (PPB)

Analyte/Surrogate

LV 1

LV 2

LV 3

LV 4

LV 5

LV 6

Aldicarb

1

5

10

25

50

100

Carbofuran

1

5

10

25

50

100

Oxamyl

1

5

10

25

50

100

Methomyl

1

5

10

25

50

100

BDMC (Surrogate)

2

10

20

50

100

200

1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

Keywords

carbamates; liquid chromatography; mass spectrometry; water;; ICS Number Code 13.060.50 (Examination of water for chemical substances)

To find similar documents by ASTM Volume:

11.02 (Water (II))

To find similar documents by classification:

13.060.50 (Examination of water for chemical substances)

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Document Number

ASTM-D7600-16(2017)

Revision Level

2016 R17 EDITION

Status

Current

Modification Type

Reapproval

Publication Date

July 15, 2017

Document Type

Test Method

Page Count

10 pages

Committee Number

D19.06