Trace ingredient是什么意思

用法例句

Recent Progress of Inorganic Trace Analysis by Mass Spectrometry;

质谱的无机痕量分析进展

Determination of Trace Phosphine by Gas Chromatography;

气相色谱-氮磷检测器分析痕量磷化氢

Determination of ultratrace plumbum by catalytic spectrophotometry;

催化光度法测定超痕量铅

A review on the determination of trace elements in cigarette smoke;

卷烟烟气中微量和痕量元素研究综述

Geochemistry of trace elements in coal from North Shanxi Province to North Ningxia Huizu Autonomous Region;

晋北-宁北煤中痕量元素的地球化学特征

Determination of trace elements in copper-zinc alloy by ICP-MS;

ICP-MS测定铜锌合金中痕量元素

The influence of spectral interferences on trace analysis of steels & alloys by inductively coupled plasma mass spectrometry;

电感耦合等离子体质谱干扰对钢铁及合金痕量分析的影响

The stability of silver solution in trace analysis;

痕量分析中银溶液的稳定性