Most of our A Levels are awarded by AQA, the UK's most popular awarding body for high school qualifications. They provide more than half of all A Level qualifications in the UK each year. AQA ...

and King Fahd University of Petroleum and Minerals personnel reviewed how ion chromatography (IC) can be used to analyze halogens and similar substances within inorganic matrices. Their findings were ...

Key Laboratory of Polymer Materials of Gansu Province, Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, College of Chemistry and Chemical Engineering, Northwest Normal ...

2008; Steinhauser et al., 2008). Cold and dry in winter, snowpack is a good archive for atmospheric environment, among which water-soluble inorganic ions (mainly including Ca 2+, SO 4 2-, Na +, NO 3 − ...