标题：Studies on Metals in Environment. III. Seasonal Variations in the Amounts of Chromium in Deposits and Correlation of Chromium with Other Components in the Deposits
摘要：Chromium is a biologically significant metal which is present in the environment. This paper describes a study of seasonal variations in the amounts of chromium and several other components in deposits regularly collected from the air in Kanazawa city during one year. The concentration of chromium amounted to 0-1.1 ppb and was comparable to those of chromium in the sea and natural waters. Several other components in the deposits were also determined and correlations among the components, including chromium, were investigated. The seasonal variation of chromium in the deposits collected at this spot showed that the meteorological conditions considerably influenced the profile of chromium in the deposits. Another important factor is artificial sources such as fuel combustion for industrial and domestic purposes. Among the components in the deposits, magnesium and chloride contents were fairly closely correlated with chromium, and sulfate was also correlated with chromium though less closely. The possible origin of chromium in the deposits is discussed.
