Norm

ASTM D7645 - 10e1 en

Standard Test Method for Determination of Aldicarb, Aldicarb Sulfone, Aldicarb Sulfoxide, Carbofuran, Methomyl, Oxamyl and Thiofanox in Water by Liquid Chromatography/Tandem Mass Spectrometry (LC/MS/MS)

  • Deze norm is ingetrokken sinds 01-01-2014

57,20 69,21 Incl BTW

Over deze norm

Status Ingetrokken
Aantal pagina's 12
Gepubliceerd op 01-06-2010
Taal Engels

1.1 This test method covers the determination of aldicarb, aldicarb sulfone, aldicarb sulfoxide, carbofuran, methomyl, oxamyl, and thiofanox (referred to collectively as carbamates in this test method) in 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 The Detection Verification Level (DVL) and Reporting Range for the carbamates are listed in Table 1.

1.2.1 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.

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

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

1.4 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.

TABLE 1 Detection Verification Level and Reporting Range

AnalyteDVL
(ng/L)
Reporting Range
(μg/L)
Aldicarb2501-100
Aldicarb Sulfone2501-100
Aldicarb Sulfoxide2501-100
Carbofuran2501-100
Methomyl2501-100
Oxamyl2501-100
Thiofanox2501-100

TABLE 2 Concentrations of Calibration Standards (PPB)

Analyte/SurrogateLV 1LV 2LV 3LV 4LV 5LV 6LV 7LV 8
Aldicarb151025355075100
Aldicarb Sulfone151025355075100
Aldicarb Sulfoxide151025355075100
Carbofuran151025355075100
Methomyl151025355075100
Oxamyl151025355075100
Thiofanox151025355075100
Carbofuran-13C6 (Surrogate)151025355075100
Methomyl-13C2,15N (Surrogate)151025355075100


FIG. 1 Example Primary SRM Chromatograms Signal/Noise Ratios


FIG. 2 Example Confirmatory SRM Chromatograms Signal/Noise Ratios

Details

ICS-code 13.060.50
Engelse titel Standard Test Method for Determination of Aldicarb, Aldicarb Sulfone, Aldicarb Sulfoxide, Carbofuran, Methomyl, Oxamyl and Thiofanox in Water by Liquid Chromatography/Tandem Mass Spectrometry (LC/MS/MS)
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