for mote in {1,3,11,21,22,23}; do

  for sensor in {ammonium,calcium,chloride,carbonate,nitrate,pH,redox}; do
    echo "Mote $mote, sensor $sensor";
    cut -d, -f1-4,7-9 data_${sensor}_mote${mote}.csv > x; 
    cat hdr.txt x > data_${sensor}_mote${mote}.csv;
  done;
done;