สิ่งแวดล้อม มลภาวะ ของเสีย
เอกสารมาตรฐาน
สหรัฐอเมริกา
ASTM
D2791-19
Standard Test Method for On-Line Determination of Sodium in Water
2019
7
ASTM Vol.11.01 (2023)
This test method covers the on-line determination of trace amounts of sodium in water using an ion-selective electrode. This test method is based on on-line application of the sodium ion electrode as reported in the technical literature (1-3).2 It is generally applicable over the range of 0.01 to 10 000 μg/L. The analyst should be aware that adequate collaborative data for precision and bias statements as required by Practice D2777 are not provided. See Section 16 for details...