Automatic preparation of sample for analysis

Claim 3

The apparatus as set forth in claim 1 in which the multi-way selector liquid sampler means comprises a pair of multi-way slide selector valves, and plural starting sample containers which are connected to and placed between the multi-way slide selector valves.

Claim 4

The apparatus as set forth in claim 1 in which the fraction selector means is a multi-way slide selector valve.

Claim 5

The apparatus as set forth in claim 1 in which the fraction selector means is a gravimetric fraction collector comprising a movable receiver having an outlet at the bottom thereof and a fixed stopper ground fitted to said bottom, and said movable receiver is connected mechanically to a microswitch via a fulcrum, said microswitch operating to impart a starting signal to said timer.

Claim 6

The apparatus as set forth in claim 1 in which a condenser is interposed between the distillation still and the fraction selector means.

Claim 7

The apparatus as set forth in claim 1 in which a reagent addition means is interposed in front of the multi-way selector liquid sampler means, the liquid sample charging and discharging means or the fraction selector means, said reagent addition means comprising a pair of four-way changeover valves, a pair of metering tubes provided respectively in two lines connecting the valves. and a reagent container and an overflow-preventing tube, respectively connected to each of the four way changeover valves.

Claim 8

The apparatus as set forth in claim 1 in which a plurality of fraction receivers are placed on a stand which is moved by a driving motor operated by said timer.

Claim 9

Apparatus for automatically preparing samples for analysis of a diacetyl-odor component, which comprises, inert gas charging means, multi-way selector liquid sampler means operated by a timer, liquid sample charging and discharging means operated by the timer, a gas washer, a condenser, diacetyl-odor collecter agent addition means, fraction selector means, and fraction receivers, which are connected in that order by pipe lines, said liquid sample charging and discharging means including a multi-way changeover valve; said liquid sample charging and discharging means forming a passage connecting said multi-way selector liquid sampler means, multiway changeover valve, and the bottom of said gas washer for introduction of a liquid sample into said gas washer and subsequent-washing thereof with gas, said liquid sample charging and discharging means forming a passage connecting said multi-way selector liquid sampler means, multi-way changeover valve, and space in said gas washer and a passage connecting the bottom of said gas washer, multi-way changeover valve, and outside of the system for discharging a gas-washed liquid residue outside of the system from said gas washer, whereby a plurality of samples for analysis containing a diacetyl-odor component in a concentrated state can be automatically and successively collected from the corresponding starting samples containing a diacetyl-odor component.

Claim 10

Apparatus for automatically preparing samples for analysis of a diacetyl-odor component, which comprises, inert gas charging means, multi-way selector liquid sampler means operated by a timer, liquid sample charging and discharging means operated by the timer, a gas washer, a condenser, diacetyl-odor collecter agent addition means, fraction selector means, and fraction receivers, which are connected in that order by pipe lines, said liquid sample charging and discharging means including a multi-way changeover valve; said liquid sample charging and discharging means forming a passage connecting said multi-way selector liquid sampler means, multiway changeover valve, and the bottom of said gas washer for introduction of a liquid sample into said gas washer and subsequent-washing thereof with gas, said liquid sample charging and discharging means forming a passage connecting said multi-way selector liquid sampler means, multi-way changeover valve, and space in said gas washer and a passage connecting the bottom of said gas washer, multi-way changeover valve, and outside of the system for discharging a gas-washed liquid residue outside of the system from said gas washer, whereby a plurality of samples for analysis containing a diacetyl-odor component in a concentrated state can be automatically and successively collected from the corresponding starting samples containing a diacetyl-odor component.

Claim 11

Apparatus for automatically and successively preparing samples for the Kjeldahl titration method from samples containing ammonia nitrogen, which comprises gas charging means, aqueous sodium hydroxide solution addition means, multi-way selector liquid sampler means operated by a timer, liquid sample charging and discharging means operated by the timer, a distillation still, a condenser, aqueous sulfuric acid solution addition means, fraction selector means, and fraction receivers, which are connected in that order by pipe lines, and which further comprises a branch pipe line extending from the outlet of said gas charging means to said fraction selector means and including washing water addition means operated by the timer, a steam generator being connected via a branch pipe line to the pipe line connecting said gas charging means and said aqueous sodium hydroxide solution addition means, said sample charging and discharging means containing a multi-way changeover valve, said sample charging and discharging means forming a passage connecting said multi-way selector sampler means, the multi-way changeover valve, and the bottom of the distillation still for charging of a liquid sample to said distillation still and carrying out of a subsequent distillation operation, said sample charging and discharging means forming a passage connecting said multi-way selector liquid sampler means, the multi-way changeover valve, and space in said distillation still and a passage connecting the bottom of said distillation still, the multi-way changeover valve, and outside of the system for discharging of a distillation liquid residue from said distillation still outside of the system.

Claim 12

Apparatus for automatically and successively preparing samples for the Kjeldahl titration method from samples containing ammonia nitrogen, which comprises gas charging means, aqueous sodium hydroxide solution addition means, multi-way selector liquid sampler means operated by a timer, liquid sample charging and discharging means operated by the timer, a distillation still, a condenser, aqueous sulfuric acid solution addition means, fraction selector means, and fraction receivers, which are connected in that order by pipe lines, and which further comprises a branch pipe line extending from the outlet of said gas charging means to said fraction selector means and including washing water addition means operated by the timer, a steam generator being connected via a branch pipe line to the pipe line connecting said gas charging means and said aqueous sodium hydroxide solution addition means, said sample charging and discharging means containing a multi-way changeover valve, said sample charging and discharging means forming a passage connecting said multi-way selector sampler means, the multi-way changeover valve, and the bottom of the distillation still for charging of a liquid sample to said distillation still and carrying out of a subsequent distillation operation, said sample charging and discharging means forming a passage connecting said multi-way selector liquid sampler means, the multi-way changeover valve, and space in said distillation still and a passage connecting the bottom of said distillation still, the multi-way changeover valve, and outside of the system for discharging of a distillation liquid residue from said distillation still outside of the system.

Claim 13

In the preparation of corresponding samples for analysis containing a diacetyl-odor component in a concentrated state from a plurality of aqueous solution samples containing diacetyl-odor components, the improvement which comprises washing said aqueous solution samples in a gas washer with an inert gas at a temperature higher than the boiling point of diacetyl and lower than the boiling point of water, cooling the diacetyl-odor component accompanied by said inert gas, thereafter collecting the component in collector means by using a collector agent for converting the diacetyl-odor component to diacetyl dioxime, and employing said inert gas as a carrier gas for charging said aqueous solution samples into said gas washer and for discharging a gas-washed sample residue from said gas washer and as a carrier gas for charging said collector agent into said collector means.

Claim 14

In the preparation of corresponding samples for analysis containing a diacetyl-odor component in a concentrated state from a plurality of aqueous solution samples containing diacetyl-odor components, the improvement which comprises washing said aqueous solution samples in a gas washer with an inert gas at a temperature higher than the boiling point of diacetyl and lower than the boiling point of water, cooling the diacetyl-odor component accompanied by said inert gas, thereafter collecting the component in collector means by using a collector agent for converting the diacetyl-odor component to diacetyl dioxime, and employing said inert gas as a carrier gas for charging said aqueous solution samples into said gas washer and for discharging a gas-washed sample residue from said gas washer and as a carrier gas for charging said collector agent into said collector means.