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1.1 This is a high-performance liquid chromatographic (HPLC) test method applicable to the determination of certain n-methylcarbamoyloximes and n-methylcarbamates in ground water and finished drinking water (1) (also see EPA Method 531.1, Revision 3.0). The following compounds can be determined using this test method:
Chemical Abstract Services Analyte Registry Number A Aldicarb 116-06-3 Aldicarb sulfone 1646-88-4 Aldicarb sulfoxide 1646-87-3 Baygon 114-26-1 Carbaryl 63-25-2 Carbofuran 1563-66-2 3-Hydroxycarbofuran 16655-82-6 Methiocarb 2032-65-7 Methomyl 16752-77-5 Oxamyl 23135-22-0 A Numbering system of Chemical Abstracts, Inc.1.2 This test method has been validated in a collaborative round-robin study (2) and estimated detection limits (EDLs) have been determined for the analytes listed in 1.1 (Table 1). Observed detection limits may vary between ground waters, depending on the nature of interferences in the sample matrix and the specific instrumentation used.
1.3 This test method is restricted to use by, or under the supervision of, analysts experienced in both the use of liquid chromatography and the interpretation of liquid chromatograms. Each analyst should demonstrate an ability to generate acceptable results with this test method using the procedure described in 12.3.
1.4 When this test method is used to analyze unfamiliar samples for any or all of the analytes listed in 1.1, analyte identifications should be confirmed by at least one additional qualitative technique.
1.5 The values stated in SI units are to be regarded as the standard.
1.6 This standard does not purport to address all of the safety problems, 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. For specific hazard statements, see Notes 1 and 3. Additional guidance on laboratory safety is available and suitable references for the information are provided (3-5).
对于氨基甲酸酯整体而言,结构上的变化主要在酯基上,一般要求酯基的对应羟基化合物具有弱酸性,如烯醇、酚、羟肟等;结构的另一个可变部分是氮原子上的取代基,氮原子上的氢可以被一个或两个甲基取代,也可以被酰基取代。根据结构的变化,可以将氨基甲酸酯划分为四种类型:N,N-二甲基氨基甲酸酯、N-甲基氨基甲酸芳基酯、N-甲氨基、甲酸肟酯、N-酰基(或羟硫基)-N-甲基氨基甲酸酯。...
典型的反应如下:对硝基苯甲酰氯适用于伯胺的衍生化反应。一种双胍化合物能同对硝基苯甲酰氯生成适合紫外检测的S-三氮杂苯环衍生物。对甲基苯磺酰氯的衍生反应为(3) N-琥珀酰亚胺对硝基苯乙酸酯 该试剂与仲胺反应生成对硝基苯乙酰胺。2、 α-氨基酸的衍生化(1) 异硫氰酸苯酯(PITC) 与氨基酸生成苯基乙内酰硫脲衍生物,即PTH-氨基酸。...
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