半岛bd体育手机客户端 说明
一般描述
This Certified Reference Material (CRM) is produced and certified in accordance withISO 17034 andISO/IEC 17025. All information regarding the use of this CRM can be found on the certificate of analysis.
应用
Product is suitable for measurement of:
制备说明
The solvent for this sample is water. This sample is packaged as a 20 mL concentrate. The sample has been autoclaved for preservation.
PREPARATION INSTRUCTIONS
To prepare solution, partially fill a 1-L volumetric flask with reagent-grade water. Open ampule QC1130-20ML (be careful to avoid cuts on glass) and transfer 10 mL from the ampule into the flask. Fill the volumetric flask to volume with reagent-grade water and mix well. The sample is now ready for immediate analysis.
Analyze the solution to determine BOD or CBOD first. If COD and TOC cannot be determined within two hours after sample preparation, an aliquot should be preserved (pH<2) using 0.2 mL of concentrated sulfuric acid per 100 mL. This aliquot should be stored at 4 degrees Celsius and analyzed as soon as possible within the 28-day maximum holding time.
NOTES: For proper oxygen depletion of BOD and CBOD, the sample should be tested in a dilution series. Use a natural surface water or diluted domestic sewage for seeded dilution water and avoid entrainment of air. For analysis of CBOD, the use of a nitrifying inhibitor is recommended. Be sure to determine the “blank” BOD of your seeded dilution water so that the proper seed correction can be made.
其他说明
Values of analytes vary lot to lot. Some lots may not contain all analytes.
基本信息
| NACRES | NA.24 |
半岛bd体育手机客户端 性质
| 等级 | certified reference material |
| CofA | current certificate can be downloaded |
| 包装 | ampule of 20 mL |
| manufacturer/tradename | RTC QCI-026 |
| 浓度 | 100% in H2O |
| technique(s) | TOC: suitable |
| application(s) | environmental |
| 格式 | matrix material |
| 储存温度 | 2-30℃ |
安全信息
| 储存分类代码 | 12 - Non Combustible Liquids |
| WGK | nwg |
| 闪点(F) | Not applicable |
| 闪点(C) | Not applicable |
SUPELCO
m.cnreagent.com
