For Gold, we seek peaks in the violet, for example 387.473; 398.938; 406.507 all in nm.
Also peaks in the blue, for example 460.751; 462.056, and 479.258.
Also a peak in the red at 627.817
And an near IR peak at 751.073
For Platinum there are no high intensity peaks in the visible range, so the Palladium peaks will be used including
Peaks in the violet at 389.41988; 395.86232; and 421.29537
Peaks in the green at 516.38404; and 567.00697
A peak in the near IR at 776.3970
Ruthenium has many high intensity peaks including:
379.935 in the near UV
And in the violet 381.272; 383.180; 386.784
In blue 408.0594; 419.990
In green 513.655; 563.624
And in red at 692.322
Rhodium has three intense peaks in the violet and they are at 382.226; 385.652; and 421.114
Cerium has many intense peaks
In violet at 383.854 and 388.245
In blue at 452.192 and 462.816
In green at 515.969; 565.097 and 566.420
In yellow at 596.222
In orange at 600.263
In red at 628.779 and 694.494
Yttrium has many intense peaks including
In violet at 395.0349, and 398.2592
In blue at 452.7239 and 464.3698
In green at 510.288 and 523.810
In yellow at 556.281 and 557.224
In red at 643.5022 and 725.458
Ytterbium has intense peaks
In violet at 393.123 and 398.799
In blue at 457.621
In green at 555.647
In red at 679.960
And in near IR at 769.948
Holmium has intense peaks
In violet at 381.325 and 386.168
In blue at 493.901 and 496.721
In orange at 598.290
In red at 660.494
Niobium has peaks at
In violet at 415.258
In blue at 460.677
In green at 527.153
In yellow at 572.919
In orange at 598.322
In red at 704.681 and 737.250
You can use a Spectrophotometer that displays a line spectrum of emissions, or one that displays a dark line spectrum of absorptions. Max Planck tells us that either way the lines would be in the same places, quantum in, quantum out = conservation of energy. So, use the instrument that pleases you the most. Sample preparation may be covered in a separate blog.
For all these value materials, many intense peaks have been omitted for the sake of brevity. For a comprehensive list of all peaks, see NIST.
Also, you may have your own ideas about what materials in the sea may be valuable to you, and the elements included here are for Gary Research purposes only — just a few elements out of over 100 elements. Some people think they should go look for cobalt and lithium to make electric car batteries. As long as they abide by the General Prudential Law of the Sea (human life always comes first), I welcome them.
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