1. A combustion analyzer for combustion analysing a sample comprising a proportion of sulphur, the analyzer comprising:
a combustion chamber comprising an inlet end and an other end, the inlet end for receiving a sample for combustion therein to form combustion products, the combustion products comprising a yield of sulphur dioxide; and
a detector receiving the combustion products from the other end of the combustion chamber for detecting an amount of sulphur dioxide in the combustion products,
characterised by further comprising a yield improver supply apparatus for supplying a sulphur yield improver to the inlet end of the combustion chamber, wherein the yield improver includes one or more of the group consisting of pyridine, benzonitrile, nitrogen dioxide, general nitrogen oxides (NOx) and 2-ethylhexyl nitrate.
2. The analyzer of claim 1, further comprising a yield improver supply line to the combustion chamber inlet end, wherein the yield improver supply apparatus has a connection to the supply line and is arranged to supply a sulphur yield improver to the combustion chamber therethrough.
3. The apparatus of claim 1, further comprising an oxygen supply line to the combustion chamber inlet end, wherein the yield improver supply apparatus has a connection to the supply line and is arranged to supply a sulphur yield improver to the combustion chamber through that supply line.
4. The apparatus of claim 1, further comprising a carrier gas supply line to the combustion chamber inlet end, wherein the yield improver supply apparatus has a connection to the supply line and is arranged to supply a sulphur yield improver to the combustion chamber through that supply line.
5. The apparatus of claim 1, wherein the yield improver supply apparatus is switchable between a first on state in which a sulphur yield improver may be supplied to the combustion analyzer and a first off state in which a sulphur yield improver may not be supplied to the combustion analyzer.
6. The apparatus of claim 1, further comprising an ozone supply apparatus arranged to supply ozone to a region of the combustion analyzer, the region being after the combustion chamber, in the detector or therebetween.
7. The apparatus of claim 6, wherein the ozone supply apparatus is switchable between a second on state in which ozone may be supplied and a second off state in which ozone may not be supplied.
8. The analyzer of claim 2, wherein the yield improver supply line comprises a liquid supply line for supplying a liquid yield improver to the combustion chamber inlet end.
9. The analyzer of claim 8, further comprising a dedicated injector inlet for supplying the liquid yield improver to the combustion chamber inlet end, the injector inlet having a connection to the liquid supply line.
10. A combustion analyzer for combustion analysing a sample comprising a proportion of sulphur, the analyzer comprising:
a combustion chamber comprising an inlet end and an other end, the inlet end for receiving a sample for combustion therein to form combustion products, the combustion products comprising a yield of sulphur dioxide;
a detector receiving the combustion products from the other end of the combustion chamber for detecting an amount of sulphur dioxide in the combustion products;
a first yield improver supply apparatus for supplying a gaseous yield improver to the inlet end of the combustion chamber, wherein the gaseous yield improver is nitrogen monoxide or a gaseous source of nitrogen monoxide; and
a second yield improver supply apparatus for supplying a liquid yield improver to the inlet end of the combustion chamber, wherein the liquid yield improver includes one or more of the group consisting of pyridine, benzonitrile and 2-ethylhexyl nitrate.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A height-adjustable grass scissors comprising a main body and a pair of blades disposed at front end of the main body, a fixed handle extending from rear end of the main body, a movable handle being pivotally disposed at rear end of the main body and drivingly connected with the blades, by means of pressing the movable handle, the blades being drivable to scissor grasses, said grass scissors being characterized in that an adjustment unit is vertically linearly movably mounted in a bottom of the main body, a bottom of the adjustment unit having a rest face for resting against the ground, whereby a distance between the blades and the ground is changeable.
2. The height-adjustable grass scissors as claimed in claim 1, wherein a bottom of the main body is formed with an opening in which the adjustment unit is vertically linearly movably mounted, two sideboards respectively upward extending from two sides of the adjustment unit, each sideboard having a press section and more than one projecting block, the main body being formed with several longitudinally arranged locating holes at intervals corresponding to the projecting blocks of the sideboards, whereby the projecting blocks can be selectively inserted and located in the locating holes to change the height of the blades from the rest face, the main body being further formed with a slot corresponding to each press section, whereby he press section outward protrudes through the slot from the main body for a user to operate.
3. The height-adjustable grass scissors as claimed in claim 2, wherein the movable handle is formed with two recesses corresponding to the two sideboards of the adjustment unit, the recesses serving as two displacement spaces, whereby only when the movable handle is pressed to the bottom, the press sections of the sideboards of the adjustment unit can be pressed to detach the projecting blocks out of the locating holes for adjusting the height.