EPA法空气中总汞分析系统

仪器简介

    Brooks Rand Lab 世界上排名第一的汞形态分析仪器生产厂家及分析实验室，美国zei大的商业总汞分析实验室及美国第二大的其它重金属分析商业实验室。

    Brooks Rand Labs空气中总汞分析系统主要应用于环境空气中总汞含量的测定；模块化的设计包含了便携式空气采样器、标样及校正模块、双管热脱附模块、冷蒸气原子荧光检测器、仪器连接附件及仪器控制及数据处理软件。系统集远程和便携式的样品收集方法于一身，通过金汞齐吸附管富集空气样品中的总汞，快速，高通量地进行样品分析，符合美国EPA IO-5方法。

Total Mercury Methodology

Sample Preparation
Samples are prepared by standard total mercury methodology (U.S. EPA Method 1631) to oxidize all mercury to Hg(II).

Vial Loading
Prepared samples are added to 40 mL vials with Teflon® lined septa caps. Samples are pre-reduced with the addition of hydroxylamine hydrochloride, and then reduced with stannous chloride, capped, and loaded into the autosampler.

Software Setup
Sample information is entered into Mercury Guru™ software, settings are selected, and then sample analysis begins. MERX does the rest!

Purging
Samples are purged directly in the autosampler vials using N2 gas to volatilize elemental mercury to the gold amalgamation traps.

Multi-Trap Processing
The first collection trap is ballistically heated to release and transfer the mercury to the analytical trap, which is in turn heated to release the mercury to the detector. Simultaneously, the second vial is purged onto the other collection trap to provide near continuous sample purging for rapid throughput.

CVAFS Detection
Mercury is detected using the Brooks Rand Model III cold vapor atomic fluorescence spectrophotometer (CVAFS), with patented optics for enhanced sensitivity.

Data Processing
Mercury Guru™ software integrates the detector signal and calculates results based on calibration and sample volume information. QC results are automatically flagged based on user-defined criteria.