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ASTM D7600 : 09e2

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

Standard Details

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 method. This method adheres to multiple reaction monitoring (MRM) mass spectrometry.

1.2 This test method has been developed by US 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

† Measurement editorially corrected.


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.

Example Primary SRM Chromatograms Signal/Noise Ratios
FIG. 1 Example Primary SRM Chromatograms Signal/Noise Ratios
Example Confirmatory SRM Chromatograms Signal/Noise
 Ratios
FIG. 2 Example 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 StandardDetails (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.

General Information

Status : Historical
Standard Type: Main
Document No: ASTM D7600 : 09e2
Document Year: 2009
Pages: 10
Edition: e2
  • Section Volume:
  • 11.02 Volume 11.02 Water (II)
  • ICS:
  • 13.060.50 Examination of water for chemical substances

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ASTM D7600 : 09e2
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