共找到 150 條與 區(qū)分濃度 相關的標準，共 10 頁
本標準規(guī)定了厚度為0.4～2.0mm的半絕緣砷化鎵晶片中碳、EL2、鉻和硅濃度的微區(qū)測量方法。 本標準適用于半絕緣砷化鎵晶片中主要剩余雜質碳、EL2、鉻和硅濃度的測定
Test method for residual impurities concentration in microzone of semi-insulating gallium arsenide
本標準規(guī)定了蚊蟲體內不敏感乙酰膽堿酯酶（AChE）的檢測方法。 本標準適用于淡色庫蚊（Culex pipiens pallens）、致倦庫蚊（Cx.pipiens quinquefasciatus）、白紋伊蚊（Aedes albopictus）、中華按蚊（Anopheles sinensis）等對
Test methods of mosquito resistance to insecticides.Test methods of insensitive acetylcholinesterase for the mosquito
Measure airborne microorganisms and viruses to determine regional background concentrations
Flowable concentration - water suspension concentration
本標準適用于井、隧道、鍋爐、反應爐、谷倉地窖、倉庫等建筑物及船倉內有缺氧之慮，而測試氧濃度并監(jiān)視、警報所使用之氧濃度計及氧濃度警報計（以下簡稱氧氣計）。本標準規(guī)定氧氣計之使用溫度范圍為 0`40℃。若氧氣濃度偏高之作業(yè)場所，亦可適用本標準
Oxygen Indicator and Oxygen Alum
Marine oil content meter
Marine oil content meter
Describes procedures for preparing reference solutions, procedures for ensuring the quality and the degree of accuracy of the solution strength
Validation of the strength of reference solutions used for measuring concentrations
本標準規(guī)定氧濃度計及氧濃度警報計之檢驗方法
Method of Test for Oxygen Indicator and Oxygen Alarm
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Validation of the strength of reference solutions used for measuring concentrations
The turbidity measurement is the most widely used method for monitoring the performance and the particle-removal efficiency of water filtration
Journal AWWA — An Analysis of Low-Level Turbidity Measurements
Methods for determination of dust concentration and dispersion
CONC. WHEEL STOPS
70% concentration of chromic acid for analysis
Air quality. Photometric method for determining the mass concentration of carbon disulfide vapor in the air of the working area
