Glacier ice Impurity and chemical concentrations in Gulkana Glacier, Alaska (2023)

This dataset has the following contents. 1.The amount of impurities, organic matter, and mineral were measured by the following method. After the samples were dried (60 degreeC, 24-48 hours)(EO-450V, ETTAS, Japan) and weighed, they were combusted for 5hour at 500 degreeC in an electric furnace(SSTR-13R, ISUZU, Japan). After weighed, they were recombusted for 1hour at 1000 degreeC. 2.Major chemical solute concentrations were measured using an ion chromatography system (ICS-1100, Thermofisher, USA). For anion analysis, we used guard and separator columns (Ion Pac AG12 A and AS12 A, Thermo-fisher, USA) with an eluent of 2.7 mM Na2CO3 and 0.3 mM NaHCO3, the flow rate of which was set at 1.5 mL min-1. For cation analysis, we used guard and separator columns (Ion Pac CG12 A and CS12 A, Thermo-fisher, USA) with an eluent of 20 mM methanesulfonic acid as an eluent with a flow rate of 1.0 mL min-1. 3.Pigment concentration were measured using a high-performance liquid chromatography (HPLC) (SHIMADZU)本数据集包含以下内容： 1. 杂质、有机质与矿物含量采用下述方法测定：将样品置于60℃条件下干燥24~48小时（EO-450V，ETTAS，日本）并称重后，放入电炉（SSTR-13R，ISUZU，日本）中于500℃灼烧5小时；再次称重后，于1000℃下复烧1小时。 2. 主要化学溶质浓度采用离子色谱系统（ICS-1100，赛默飞世尔（Thermofisher），美国）进行测定。阴离子分析时，采用保护柱与分离柱（Ion Pac AG12 A与AS12 A，赛默飞世尔，美国），淋洗液为2.7 mM碳酸钠与0.3 mM碳酸氢钠，流速设置为1.5 mL·min⁻¹。阳离子分析时，采用保护柱与分离柱（Ion Pac CG12 A与CS12 A，赛默飞世尔，美国），以20 mM甲磺酸作为淋洗液，流速设置为1.0 mL·min⁻¹。 3. 色素浓度采用高效液相色谱（HPLC，岛津（SHIMADZU））进行测定。