ASTM D6954認證和檢測 

概述:[中介]ASTM D6954認證和檢測

刷新時間:
2025-07-02 10:30:13 點擊76949次
聯系電話:
0592-5522220 黃先生
QQ:
2561698119
信用:4.0  隱性收費:4.0
描述:4.0  產品質量:4.0
物流:4.0  服務態度:4.0
默認4分 我要打分

ASTM D6954-04
 
The scope of the project is to assess the degree of physical property losses of polymers by a thermal oxidation process and determine the rate of aerobic biodegradation of the submitted test product as well as its ecological impact in the defined applications and disposal environments after degradation. This method is divided into three tiers, whose goals and objectives are outlined in the
following headings.
 
3.1 Tier 1-Heat Aging of Oxidatively Degradable Plastics
The goal of Tier 1 is to evaluate the extent of molecular weight loss resulting from thermal oxidation of test material using ASTM D5510-94(2001). The test material is incubated in a Forced-Ventilation or Gravity-Convection Oven at a temperature not exceeding 20℃ from the end use and maintained at a relative humidity level for a defined period of time (depending on rate of fragmentation). Before and after exposure, the following analyses are performed on the test material: molecular weight, polydispersity index, mass of volatiles, and % gel. Weight loss will also be determined upon termination of the oxidation process.

All observations and conditions (time, temperature, and humidity) will be recorded on a daily basis.
 
UV light exposure can be an alternative route for oxidation testing in Tier 1. 
Inquire for more details regarding pricing for UV exposure.

3.2 Tier 2-Biodegradability Testing 
The goal of Tier 2 is to determine the degree and rate of aerobic biodegradation of a test material from Tier 1 using ASTM D5338-98(2003). In this method, the test material is incubated with a compost inoculum and the percentage of biodegradability is obtained by determining the percent of conversion of carbon in the test material to carbon in the form of CO2 in the gas phase. The inoculum can be derived from several sources ranging from commercially operated compost facilities to yard/plant matter compost. The aerobic decomposition occurs under high-solids conditions with weekly mixing of the contents to provide optimum contact between inoculum and test material and to keep the entire contents of the vessel aerobic for the duration of the test.

ASTM D5338-98(2003) requires a setup of three replicates of each of the following: the test product, a blank that contains inoculum only, a negative control that contains polyethylene in the same form as the test material, and a positive control of thin-layer chromatography cellulose. Air (CO2 free) will be fed to the reactors at a constant flow rate to allow accurate determination of CO2 level in the exhaust air, and the amount of CO2 converted from organic carbon in the test material will be calculated based on the blank reactor systems.

Reactor vessels will be incubated in the dark or in diffused light at 58℃±2 for a maximum of 180
days.  The incubation time may be extended until gas production is not significantly greater than that of the blank during one week, or until 70% of the positive control has been degraded.  Carbon dioxide gas concentrations will be measured regularly throughout the study (at least daily)
using a Ba (OH)2 scrubbing solution in the exhaust of the reactors. The following analyses will also be conducted on the inoculum:  pH, volatile fatty acids, percent of dry solids, percent of volatile solids, total Kjeldahl nitrogen, and ammonia nitrogen. Total organic carbon and volatile solids content of the test product will be determined prior to test initiation.

Calculations will be performed according to the method to determine the overall
percent biodegradability of the product.

3.3 Tier 3-Toxicity Testing
The goal of Tier 3 is to evaluate the ecological impact of the test material in the final disposal medium after oxo-biodegradation testing. ASTM D6954 recommends several terrestrial and aquatic toxicity tests for determining the effect a product has on plant and animal life.

ASTM E1440:Determines possible toxicity effects on aquatic invertebrates. Inoculum from biodegradation testing is extracted with water and filtered. One day aquatic toxicity test with Rotifer brachionus is performed. Testing is recommended if final disposal medium is aquatic in nature.

Plant Germination:Determines possible toxicity effects on plant germination. Inoculum from biodegradation testing (before and after) is extracted with water and filtered. Various dilutions of the supernatant are prepared. Cress seed germination is compared to that of a prepared blank.  Testing is recommended if screening processing additives are used at 1% or less in the plastic.

OECD 207:Determines possible toxicity effects on terrestrial invertebrates. Inoculum from biodegradation testing used at 65% dry solids. Inoculum applied to soil containing earthworms.  Weight change and survival are measured over the course of three months. Testing is recommended if final disposal medium is soil (very common).

OECD 208:Determines possible toxicity effects on plant growth. Inoculum from biodegradation testing used at 65% dry solids. Generally, three plant species (two dicots, one monocot) are tested in a homogenized mixture of soil and inoculum. Plant emergence survival and growth are evaluated over the course of approximately one month. Recommended is final disposal medium is soil (very common).
Additional testing includes pH, metals analysis, and ability to hold and percolate water. All three analyses are performed before and after oxo-biodegradation testing.

4.0 Reporting and Deliverables
 
Xiamen Botest Business Services Co., Ltd will issue a report of the initial analysis within 15 business days of test completion. Should the remaining tests be performed, the final report with quality control review will be issued within 30 working days of test completion. The report will include all necessary information per method requirements.

For detail information, please contact Xiamen Botest Business Services Co.,Ltd.

[本信息來自于今日推薦網]
  • xmcert發布的信息
  • 美國NSF產品認證步驟
  • [中介]美國NSF產品認證步驟 不同的認證方案因產品的不同,其認證步驟亦各有差別。通常一個完整的認證過程主要由以下七個步驟組成...
  • DWI認證
  • [中介]DWI認證 水供給(水質)法規2000中的法規31是對在英國和威爾士水務公司所使用化學和建筑產品執行歐盟飲用水指令(DWD)委員會中的條款10,從水的來源處直到輸送到消費者建筑物的點上。其陳述了如何證明這...
  • DVGW認證
  • [中介]進入德國的衛浴產品最主要的認證為DVGW認證,該認證由DVGW(全稱為德國燃氣與水工業協會)頒發,針對衛浴產品,DVGW將它們分成43個類別,幾百個小類,分別制定了相對應的技術標準,同時針對于飲用水有關的...
  • USDA BioPreferred認證
  • [中介]USDA BioPreferred認證...
  • OK Compost認證
  • [中介]From the Belgian head office in Vilvoorde, and from the 13 other establishments throughout the world, more than 2,500 employees serve in excess of 15,000 industrial customers....
  • GreenPla認證
  • [中介]Former Biodegradable Plastics Society, Japan has changed the name to Japan BioPlastics Association on 15th of June 2007....
主站蜘蛛池模板: 91亚洲精品第一综合不卡播放| 久久国产亚洲高清观看| 精品久久久无码中文字幕边打电话 | 欧美同性videos免费可播放| 免费永久国产在线视频| 色聚网久久综合| 国产成人福利在线视频播放尤物| 91chinese在线| 天天干天天操天天干| 丝袜美腿美女被狂躁动态图片| 日韩a视频在线观看| 亚洲а∨精品天堂在线| 欧美高清免费一级在线| 免费无遮挡无码永久视频| 老司机午夜电影| 国产免费午夜a无码v视频| 精品国产一二三区在线影院| 国产精品日韩欧美| 99sescom色综合| 女人张开腿让男人做爽爽| 丝袜情趣在线资源二区| 日本一卡2卡3卡四卡精品网站| 亚洲AV无码一区二区三区网站| 欧美成人精品第一区| 亚洲精品无码少妇30P| 粉嫩小仙女扒开双腿自慰| 四虎永久精品免费观看| 青青草原精品99久久精品66| 国产成人精品免费视频大全可播放的| 2020精品国产自在现线看| 在线免费观看a级片| fc2成年免费共享视频18| 师尊要被cao坏了by谦野| 中文无码一区二区不卡αv| 日本免费xxxx色视频| 久久精品国产99国产精品澳门| 樱花草视频www| 亚洲午夜无码久久| 欧美日韩亚洲成色二本道三区| 亚洲第一二三四区| 渣男和渣女做不干净事情视频|