C51;Z50 标准查询与下载

KS I ISO 9998:2008 水质.水质试验中使用的微生物菌落计数培养基的评定和控制技术

이 표준은 여러 가지 다른 회사에서 생산된 재료를 이용하여 제조한 동일 배지의 비교 및 평

Water quality－Practices for evaluating and controlling microbiological colony count media used in water quality tests

BS EN ISO 22032:2009 水质 沉积物和污水污泥中选定多溴二苯醚的测定 使用萃取和气相色谱/质谱法的方法

This International Standard specifies a method for the determination of selected polybrominated diphenyl ethers (PBDE) (see Figure 1 and Table 1) in sediment and sludge using gas chromatography/mass spectrometry (GC-MS) in the electron impact (EI) or negative ion chemical ionization (NCI) mode. When using GC-EI-MS, the method is applicable to samples containing 0,05 μg/kg to 25 μg/kg of tetra- to octabromo congeners and 0,3 μg/kg to 100 μg/kg of decabromo diphenyl ether (BDE-209), respectively. Approximately ten times lower concentrations can be quantified when using GC-NCI-MS. The risk of misinterpretation of interfering substances is smaller with EI due to its higher specificity. It is also possible to analyse other brominated diphenyl ethers according to this International Standard, after verifying its applicability in each case.

Water quality. Determination of selected polybrominated diphenyl ethers in sediment and sewage sludge. Method using extraction and gas chromatography/mass spectrometry

DIN ISO 13964:1999 空气质量.环境空气中臭氧含量测定.紫外分光光度法

Air quality - Determination of ozone in ambient air - Ultraviolet photometric method (ISO 13964:1998)

ISO 9998:1991 水质 水质试验中使用的微生物菌落计数培养基的评定和控制技术

Describes a method used for the comparison and evaluation of the same medium prepared from different lots of materials, and deals with the comparison and evaluation of different media which are used for the same purpose. Annexes A and B form an integral part of this Standard.

Water quality; practices for evaluating and controlling microbiological colony count media used in water quality tests

DIN ISO 4219:1990 空气质量.环境空气中气态硫化合物的测定.取样设备

Air quality; determination of gaseous sulfur compounds in ambient air; sampling equipment; identical with ISO 4219:1979