Tiêu chuẩn quốc tế
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Số hiệu
Standard Number
ASTM D7598-16(2017)
Năm ban hành 2017
Publication date
Tình trạng
A - Còn hiệu lực
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Tên tiếng Anh
Title in English Standard Test Method for Determination of Thiodiglycol in Water by Single Reaction Monitoring Liquid Chromatography/Tandem Mass Spectrometry
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Chỉ số phân loại Quốc tế (ICS)
By field |
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Số trang
Page 9
Giá:
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Phạm vi áp dụng
Scope of standard 1.1 This procedure covers the determination of thiodiglycol (TDG) in surface water by direct injection using liquid chromatography (LC) and detected with tandem mass spectrometry (MS/MS). TDG is qualitatively and quantitatively determined by this test method. This test method adheres to single reaction monitoring (SRM) 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 TDG are listed in Table 1. Analyte DVL (μg/L) Reporting Range (μg/L) Thiodiglycol 20 100-10 000 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 ratio at the DVL. FIG. 1 Example SRM Chromatograms Signal/Noise at Detection Verification Level 1.4.2 The RL is the concentration of the Level 1 calibration standard as shown in Table 2. The reporting limit for this test method is 100 μg/L. Analyte/Surrogate LV 1 LV 2 LV 3 LV 4 LV 5 LV 6 LV 7 Thiodiglycol 100 250 500 1 000 2 500 5 000 10 000 3,3'-Thiodipropanol 100 250 500 1 000 2 500 5 000 10 000
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