QX/T 419-2018
Specifications for air negative ions observation-Capacitance inhalation
QX/T 475-2019
Technical requirements for air negative ions automatic measurement instrument-Capacitance inhalation
20192358-T-416
Method for air negative ion concentration observation — capacitance inhalation
T/GIEHA 031-2021
T/CAQI 141-2020
T/SICCA 006-2019
T/CIET 761-2024
SN/T 2558.2-2011
Testing method for import and export functional textiles-Part 2:Negative ion concentration
T/ADBM 001-2016
T/CMSA 0024-2021
T/CBCSA 14-2020
GB/T 37385-2019
Test method for chloride content of silicon—Ion chromatography method
GB/T 42276-2022
Determination of fluorine ion and chloride ion in silicon nitride powder—Ion chromatography method
GB/T 42263-2022
Determination of nitrogen content in silicon single crystal—Secondary ion mass spectrometry method
GB/T 37861-2019
Determination of halogen in electrical and electronic products—Ion chromatography method
GB/T 41068-2021
Nanotechnologies—Determination of water-soluble anions content in graphene powder—Ion chromatography method
GB/T 39701-2020
Limit and test method of ammonium ion content in fly ash
GB/T 44999-2024
Determination of phosphorus content in detergents—Inductively coupled plasma mass spectrometry
HG/T 6108-2022
GB/T 40111-2021
Standard test method for fluorine,chlorine and sulfur in petroleum products—Combustion-ion chromatography