{"id":272,"date":"2026-07-07T07:10:42","date_gmt":"2026-07-06T23:10:42","guid":{"rendered":"https:\/\/www.aimoli2016.cn\/?p=272"},"modified":"2026-07-07T07:10:44","modified_gmt":"2026-07-06T23:10:44","slug":"what-to-do-if-groundwater-voc-sample-data-is-inaccurate","status":"publish","type":"post","link":"https:\/\/www.aimoli2016.cn\/?p=272","title":{"rendered":"What to do if groundwater VOC sample data is inaccurate?"},"content":{"rendered":"\n

In the field of groundwater VOC (Volatile Organic Compound) sampling, “sample distortion” has long been a primary challenge plaguing the environmental monitoring industry.<\/p>\n\n\n\n

At one particular environmental monitoring station, sample deviation reached as high as 35%; however, after switching to the Emery AML919 groundwater bladder pump sampler<\/a>, that deviation was reduced to just 2%.<\/strong><\/p>\n\n\n\n

Last week, at the invitation of a local environmental monitoring station, the Emery team traveled to an industrial park in Northwest China to conduct groundwater sampling<\/a>.<\/p>\n\n\n\n

Director Chen, who led the team, first contacted me during an international symposium on soil and groundwater held in May; at the time, they were planning to purchase an imported groundwater sampler.<\/p>\n\n\n\n

They had recently taken on new monitoring tasks\u2014expanding coverage within the industrial park\u2014and needed to ensure the authenticity and reliability of their data.<\/p>\n\n\n\n

Causes of sample distortion in groundwater sampling:<\/h2>\n\n\n\n

The station had previously relied on traditional domestic groundwater samplers. Operations involved using bailers for well purging and sampling, requiring manual lowering and lifting of the bailer, which resulted in very low efficiency.<\/p>\n\n\n\n

Furthermore, this method easily disturbed the water in the well, causing volatile losses and cross-contamination. This led to significant deviations in VOC duplicate samples\u2014peaking at 35%\u2014far exceeding permissible standards.<\/p>\n\n\n\n

Consequently, they urgently needed a more advanced groundwater sampler to meet their new operational requirements.<\/p>\n\n\n\n

Solutions for inaccurate groundwater sampling data\uff1a<\/h2>\n\n\n\n

Emery\u2019s AML919 groundwater bladder pump sampler breaks through the limitations of traditional technology by utilizing a fully enclosed, low-flow bladder pump design. The water sample remains isolated from the air throughout the entire process, and both the bladder and discharge tubing are made of PTFE (Teflon), fundamentally eliminating VOC loss due to volatilization.<\/p>\n\n\n\n

To address the issue of cross-contamination, the AML919 features a quick-connect bladder replacement design that allows for swaps in just 30 seconds. Combined with a detachable, washable stainless steel filter screen, it effectively prevents cross-contamination.<\/p>\n\n\n\n

Three key features of the Emery AML919 bladder pump groundwater sampler:<\/h2>\n\n\n\n
    \n
  1. Affordable price, superior specifications. Imported equipment comes with a high price tag, yet offers a standard lift of only 60 meters and a water quality monitor capable of measuring just five parameters.<\/li>\n<\/ol>\n\n\n\n

    In contrast, the AIMOLI AML919 groundwater bladder pump sampler features a standard lift of 70 meters (customizable to accommodate various well depths) and monitors six water quality parameters\u2014including turbidity, a metric absent in the imported models\u2014thereby providing more comprehensive data.<\/p>\n\n\n\n

      \n
    1. Rapid discharge and more reliable data. The AIMOLI AML919 delivers water in an average of three minutes, matching or surpassing the performance of imported equipment. Furthermore, because the entire sampling process requires only a single unit rather than a combination of multiple devices, the risk of secondary water contamination is minimized at the source, ensuring greater data reliability.<\/li>\n\n\n\n
    2. Reduced labor costs and workload. The AML919 is lightweight and portable; just two staff members can independently complete the entire sampling operation. This not only cuts labor costs but also significantly lowers the learning curve for operators.<\/li>\n<\/ol>\n\n\n\n

      After seeing the presentation on the AIMOLI AML919 groundwater bladder pump<\/a> sampler at the conference, Director Chen expressed great interest and invited us to conduct a sampling demonstration at a local industrial park.<\/p>\n\n\n\n

      Field tests at a chemical industrial park in Northwest China demonstrated the AML919’s capabilities: it successfully sampled from a 92-meter-deep well with a VOC recovery rate of 98.7%. The sampling time per well was reduced from the traditional four hours to just 40 minutes, and the daily output increased from two wells to six\u2014a threefold boost in efficiency.<\/p>\n\n\n\n

      Director Chen was highly impressed with the AML919; consequently, he cancelled the planned purchase of imported groundwater samplers and opted to switch to AIMOLI\u2019s groundwater sampling equipment instead.<\/p>\n\n\n\n

      AIMOLI Environmental Instruments\u2014precision that leaves the competition scrambling!<\/p>\n\n\n\n

      \"\"<\/figure>\n","protected":false},"excerpt":{"rendered":"

      In the field of groundwater VOC (Volatile Organic Compound) sampling, “sample distortion” has long been a primary challenge plaguing the environmental monitoring industry. At one particular environmental monitoring station, sample deviation reached as high as 35%; however, after switching to the Emery AML919 groundwater bladder pump sampler, that deviation was reduced to just 2%. Last […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-272","post","type-post","status-publish","format-standard","hentry","category-blog"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t