ASTM International

Standard Test Method for Nitrite-Nitrate in Water by Nitrate Reductase
 N D7781

Annotation

This test method is applicable to the determination of nitrate plus nitrite (as nitrogen) in drinking water, surface, saline, wastewater, and ground waters. The applicable range of this test method is from 0.05 to 5 mg/L of nitrogen. The range may be extended upward by dilution of an appropriate aliquot. The 40 CFR Part 136 Method Detection Limit (MDL) is 0.02 mg /L.

It is the user's responsibility to ensure the validity of this test method for waters of untested matrices. The quality control criteria in Section 17 for method blanks, laboratory control samples, matrix spikes and matrix duplicates must be met.

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

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.

Автоматический перевод:

Метод стандартной пробы для нитрата нитрита в воде редуктазой нитрата

Этот метод тестирования применим к определению нитрата плюс нитрит (как азот) в питьевой воде, поверхности, солончаке, сточных водах и грунтовых водах. Применимый диапазон этого метода тестирования от 0.05 до 5 mg/L азота. Диапазон может быть расширен вверх разводнением надлежащего определенного количества. 40 Частей 136 CFR Method Detection Limit (MDL) составляют 0.02 мг/L.