A professional portable heavy metals analysis system, combining the reliable Metalyser handheld unit with a high-quality waterproof 10 inch tablet PC, offering enhanced levels of precision. The tablet PC permits multi-point standard addition analysis, and with the manual peak height calculation function, peaks can be measured that automatic techniques cannot detect. The spreadsheet function can average data, calculate correlation coefficients, draw best fit lines and calculate the original sample concentration. With these tools the field user can detect levels as low as 1ppb with confidence.